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Prospect Smackdown: Shelby Miller vs. Julio Teheran

St. Louis Cardinals right-hander Shelby Miller and Atlanta Braves right-hander Julio Teheran (Photos by Doug Benc [Miller] and Christian Petersen [Teheran], courtesy Getty Images)

Prospect Smackdown: Shelby Miller vs. Julio Teheran

Last week we compared Jameson Taillon and Taijuan Walker.

This week we turn our attention to another pair of premium right-handed pitching prospects, Shelby Miller of the St. Louis Cardinals and Julio Teheran of the Atlanta Braves.

Star-divide


BACKGROUND

Miller: Shelby Miller was drafted in the first round in 2009 out of high school in Brownwood, Texas. Drafted 19th overall, he turned down baseball at Texas A&M, earning a $2,875,000 bonus from St. Louis. He was supposed to be somewhat raw when drafted, but he showed more polish than expected with a very strong full-season debut in the Midwest League in 2010, following that up with an even better campaign in '11. Miller has good mound presence and exudes confidence. He served a week-long suspension last summer due to an alcohol-related infraction but he works hard on the field and his makeup is not a long-term concern.

Teheran:
Teheran was signed in 2007 as a 16-year-old, out of Columbia. He received an $850,000 bonus, which was the biggest bonus paid that year to an international free agent. He most likely would have been a first-round pick if draft-eligible in 2009. His career took off in '10 with strong pitching at three levels, and he punctuated that last year with a terrific season in Triple-A at age 20. Teheran's makeup is considered outstanding, with an excellent work ethic and dedication to the game.

Comparison:
Their backgrounds as coveted amateurs are similar, at least as much as they can be given that one guy is from Texas and the other is from Colombia. Both have the emotional and intellectual equipment to be major league starters, although Teheran is currently more mature. Miller has a bit more growing up to do.

PHYSICALITY, TOOLS, HEALTH

Miller: Miller is a 6-3, 195 pound right-handed hitter and thrower, born October 10th, 1990. He is a solid overall athlete. His fastball tops out at 97 MPH and works consistently at 93-95. The heater isn't straight either, with movement that can be overpowering, yet his command of the pitch continues to improve. His curveball is a plus pitch on its best days, and he's made good strides refining his changeup. Miller loves overpowering people with his fastball and the Cardinals have had to encourage him to use the curveball and changeup more often. His control is impressive for a young power pitcher and I don't think command will be a long-term issue. He has a clean-and-free delivery that generates easy heat and should help him stay healthy and durable. He has had no significant injury issues and the Cardinals have built his workload gradually.

Teheran:
Teheran is a 6-2, 175 pound right-handed hitter and thrower, born January 27, 1991. He is a good natural athlete and has plenty of zip with his fastball, peaking at 96-97 and working consistently at 93-95. He locates his fastball well. His best secondary pitch is a very strong changeup. Teheran's other pitches are a curveball and a slider. They drew good reviews in the minors, but weren't as impressive during his brief major league trial last year and both pitches need additional consistency, although both have above-average potential. He throws strikes and has a better feel for pitching than most moundsmen his age. Teheran's delivery has some effort and he had issues with shoulder soreness in the low minors, although he's been durable the last two years.

Comparison:
They were born within three months of each other. Miller has more "classic pitcher size" but both are fine athletes. I think their fastballs are comparable. Teheran has a superior changeup, but Miller has a better breaking ball, although paradoxically, Teheran integrates his secondary stuff better than Miller at this point. Miller has easier mechanics and a cleaner health record.

PERFORMANCE

Miller: Miller began 2011 with High-A Palm Beach in the Florida State League, posting a 2.89 ERA with an 81/20 K/BB in 53 innings with just 40 hits allowed. Promoted to the Double-A Texas League, he went 9-3, 2.70 with an 89/33 K/BB in 87 innings. Overall last year he went 11-6, 2.77 with a 170/53 K/BB in 140 innings, with 112 hits allowed and a 0.74 GO/AO and four homers. He has pitched 247 pro innings with an 18-11 record and a 3.17 ERA with a 312/88 K/BB and 214 hits allowed.

Teheran:
Teheran spent 2011 with Triple-A Gwinnett in the International League, going 15-3 with a 2.55 ERA (second in the league) and a 122/48 K/BB ratio in 145 innings. He allowed 123 hits with a 0.80 GO/AO and just five homers allowed. He made three starts for the Braves and two relief appearances, giving up 21 hits and 11 runs in 19.2 innings for a 5.03 ERA, with a 10/8 K/BB and four homers allowed. He has pitched 384 minor league innings in his career so far, with a 28-17 record, a 2.96 ERA, and a 365/110 K/BB ratio.

Comparison:
Miller has more impressive K/IP and H/IP ratios, but Teheran has a better K/BB ratio and has faced more difficult competition, being very young for Triple-A last season.

PROJECTION

Miller: If all goes properly, Miller can be a number one or two starter with three plus pitches and solid command.

Teheran:
If all goes properly, Teheran can be a number one or two starter with two plus pitches, two solid pitches, and excellent command.

Comparison:
Their styles are a bit different, but both of them have the potential to be staff anchors.

SUMMARY
They are very close with background, with Teheran having an edge in current maturity. Their fastballs are similar. Teheran has a better changeup and better current command, but Miller has a better current breaking ball and more classic mechanics. Both have been statistically successful, with Miller having better dominance ratios but Teheran having pitched against tougher competition. Overall it is very close, but I very slightly prefer Miller due to the dominance factors. Both are Grade A prospects. I ranked Miller Number Two on my Top 50 pitching list and Teheran Number Four.

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Comments

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Thanks, John.

Great write-ups, per usual.

Frustrating, though—-nothing to correct or complain about. Just good info, and good logic. Sigh.

One question: in your opinion, might Teheran be just a bit likelier than Miller to stay healthy, if Shelby relies on a CB as his chief secondary offering, while Julio emphasizes the straight change (i.e., is the changeup less strain on the arm than a slider or curve)?

Thanks again!

by Mekonsrock on Mar 6, 2026 2:30 PM EST reply actions  

I don't think there is much reason to think either is significantly more likely for injury

Miller may rely on a curve, but Teheran does have the past shoulder soreness (though I think it was just in his age 17 season) and a delivery that seems to have a little more effort to it (though I don’t personally think there are any mechanical red flags). They’re both very strong prospects without much that separates them. I’d personally take Teheran, but I can disagree with anyone taking Miller. They’re clearly the two top tier RHP prospects in baseball IMO.

by nixa37 on Mar 6, 2026 2:39 PM EST up reply actions  

Mechanics and past injury history

are a million times more predicative of future health than throwing a curve v. a change. Miller’s sizable frame and smooth mechanics bode extremely well.

Besides, if Teheran can’t regularly throw a quality breaking ball, he’s not going to be that great.

by johnorpheus on Mar 6, 2026 3:02 PM EST up reply actions  

If Miller can't regularly throw a good third pitch, he's not going to be that great either

And honestly, the distinction between smooth mechanics and those that have effort are mostly meaningless as far as predicting injury (generally it has more to do with repeatability and command). Mark Prior had incredibly “effortless” mechanics, but all that meant is he created velocity almost entirely with his arm instead of his whole body.

by nixa37 on Mar 6, 2026 3:34 PM EST up reply actions  

Miller has a good third pitch

and even if his change-up stays average, he can still be a number two. A plus breaking ball is much more important than a straight change, as it changes the batter’s eye level. Teheran is a 3rd starter at best without a consistent breaking ball.

Also, you don’t know what you’re talking about in regards to mechanics. You’re telling me a guy having a clean, repeatable delivery is meaningless compared to a max-effort mess? Then why do so many scouts worry about delivery at all in regards to health? And giving random examples of guys such as Prior breaking down doesn’t mean mechanics don’t matter.

by johnorpheus on Mar 6, 2026 7:58 PM EST up reply actions  

Prior's issues

are just as likely a result of high workloads as a young pitcher and cascading effect due to compensatory adjustments in his delivery following his collision with Giles. For “Inverted W” theorists he had that working against him as well.

by charles wallace on Mar 7, 2026 10:34 AM EST up reply actions  

He had issues outside of just the inverted W

And the high workloads and (often overlooked) collision with Giles certainly didn’t help things. Still, Prior is a prime example of a pitcher that was perfectly built to use his legs to generate velocity, but he went to a “tall and fall” coach that had him creating almost all his velocity with forearm lag and scap loading.

by nixa37 on Mar 7, 2026 11:00 AM EST up reply actions  

Miller third pitch is no better than Teheran's currently

And preferring a plus breaking ball to a plus change is a purely subjective thing. We’ve seen plenty of SP be successful with a change as their swing and miss pitch. While it may not change the batters eye level in the same way, its also much more difficult for the batter to distinguish between a fastball and a change than a breaking ball and a change, thus the change makes both pitches play up to an even higher level. It’s also a bit misleading to call Teheran’s change a straight change. Yes, he throws it with a “straight change” grip, but he gets a ton of horizontal movement on the pitch. In fact, the differential in the horizontal movement of his change and fastball would have ranked third or fourth among all RH SP in baseball last year if he qualified.

And honestly, you’re going to tell me I don’t know what I’m talking about in regards to mechanics? I do work as a youth pitching coach. I’ve studied mechanics quite closely for the past few years. Its something of a hobby of mine. Yes, I am telling you a “clean” delivery is mostly meaningless compared to a “max effort” one in regards to injury issues. You brought up the one real injury issue between the two, which is repeatability, but a guy with clean looking mechanics can still have issues repeating them and a guy with violent looking mechanics can still repeat them perfectly. I don’t deal in generalities, I deal in specifics. Scouts generally aren’t looking at mechanics from a potential injury perspective, and if they are they probably shouldn’t be. Scouts should be looking at mechanics purely from the perspective of what they mean for command and how well they are repeated. If they looking at them from an injury perspective, without the benefit of slow motion video, then they’re doing everyone a disservice. Its just too hard to see the injury red flags without video, and even if the red flags are there, genetics play such a huge role that predictions are still just statements on the probability of injury.

by nixa37 on Mar 7, 2026 10:57 AM EST up reply actions  

curveball vs. changeup

personally, i’d rather have a pitcher with a plus changeup and average curveball, as opposed to a plus curveball and average changeup

especially in the minor leagues, where you see guys with advanced curveballs have much more drastic differences between their strikeout rate and swinging strikeout rate, as compared to guys who don’t rely on their curveball as their best secondary

the reason this matters, is because called strikes don’t translate as well to the majors as swinging strikes. whereas minor leaguers are looking at a called strike three, major leaguers are fouling those pitches away. relatively speaking, it make the pitcher less valuable in my opinion.

my issue though, with Teheran, still comes down to not enough strikeouts in general. regardless of the issue of a developing breaking ball, there are examples of guys, who go through the minors and then come up to the majors, with only a fastball/changeup combo (as a Dbacks fan, Dan Hudson comes to mind) but they had great strikeout rates in the minors which largely translated to the majors.

it just seems to me that if Teheran’s fastball/changeup combo really was that good, then the numbers should show it.

by blue bulldog on Mar 7, 2026 6:02 PM EST up reply actions  

I think had Teheran not struggled upon his initail ML call up

this would be even closer…with maybe even teheran ahead of miller. point being these guys are extremely close talent wise and could make impacts in the MLB real soon. nice write up.

"On [umpire] Jeff Kellogg taking a foul tip to the groin: ‘Two balls, one strike.’"

by James Westfall on Mar 6, 2026 2:54 PM EST reply actions  

or if he didn't get the crap pounded out of him

in his first spring training outing.

by johnorpheus on Mar 6, 2026 3:03 PM EST up reply actions  

If that has anything to do with someone's opinion, then they're not doing it right.

It was his first spring appearance, he was going up against the Tigers A lineup, the wind was blowing out hard, he wasn’t starting, and he had to come in an inning earlier than expected due to Delgado’s struggles.

by nixa37 on Mar 6, 2026 3:36 PM EST up reply actions  

Some questions for you guys

Will Teheran start year in Braves rotation? Will he stick there after Hudson’s return?
When will Cardinals call up Miller?
Is trevor bauer going to pitch this year in MLB sooner then in September?

I think we will see Teheran first this year, but I dont know if Bauer is second and Miller third…

before there was law, there were the Cowboys!!!

by orli on Mar 6, 2026 3:42 PM EST reply actions  

some guesses

Yes. Yes.
Yes. In August.
Yes. In July.

by John Sickels on Mar 6, 2026 5:26 PM EST up reply actions  

bauer looks sweet

If the zona brass has any balls/sense he will be in that rotation by June. Saunders and collmenter can’t even compare.

by St.Steve on Mar 6, 2026 6:17 PM EST up reply actions  

No sense in forcing Bauer to the majors. If he’s ready in May or June then by all means set him loose. But I think they’re being smart by not putting a ton of pressure on him to have to immediately be a key part of the starting rotation that is trying to defend their division title.

My son, Adalberto Mejia. He's got the goods - he just needs a cool nickname.

"There ain’t much to being a ballplayer, if you’re a ballplayer." - Honus Wagner

by Fla-Giant on Mar 6, 2026 11:19 PM EST up reply actions  

i don't see Bauer being called up

unless Collmenter and Saunders are struggling a lot

by blue bulldog on Mar 7, 2026 12:57 AM EST up reply actions  

Interesting

So, John, who do you see as being in Atlanta’s rotation on opening day?

My son, Adalberto Mejia. He's got the goods - he just needs a cool nickname.

"There ain’t much to being a ballplayer, if you’re a ballplayer." - Honus Wagner

by Fla-Giant on Mar 6, 2026 11:21 PM EST up reply actions  

As far as opening day

I’d assume Jurrjens, Hanson, Beachy, Minor, and Teheran. The real question is who is getting bumped once Hudson is ready to return.

by nixa37 on Mar 7, 2026 11:03 AM EST up reply actions  

you are not factoring the almost guaranteed injury of either jurrjens or hanson which will eventually happen.

"On [umpire] Jeff Kellogg taking a foul tip to the groin: ‘Two balls, one strike.’"

by James Westfall on Mar 7, 2026 3:20 PM EST up reply actions  

That's definitely a possibility

Another is that one of those two gets moved in a trade if Teheran and/or Delgado really proves themselves over the first couple months.

by nixa37 on Mar 7, 2026 4:10 PM EST up reply actions  

im just pumped

that i have both of these guys in my keeper league

by dbacksfaninGA on Mar 8, 2026 4:41 PM EST reply actions  


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