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Discussion: The Value of Comparisons





The Value of Comparisons

Conor Glassey has an interesting article in Baseball America online today, about how scouts use player comparisons when evaluating prospects. The article is behind the paywall, but if you have a BA subscription this piece is definitely worth reading and brings to mind a topic for community discussion.

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The basic gist of the piece is that while scouts and organizations use comps all the time, there are some pitfalls. Glassey makes the point that most comparisons end up looking bad, and quotes Cleveland Indians scouting director Brad Grant thusly:

"The difficulty is, you're comparing a 17- or 18-year-old person to somebody who has established a major league career," Indians scouting director Brad Grant said. "It's often easy to just say, 'Well, this guy has this tool set, so he's going to be this type of player.' It's an easy thing to say, but it's a more difficult thing for that person to become. There's a balancing act to it. By using player comps, if you compare someone to an all-star, you put that person on a pedestal to become something that is very difficult to reach. You put a picture in your mind of what this player is, and that's not always a fair thing to do to an amateur player.

"You're comparing people to people. It's human beings and everyone is different. You want to be compared to somebody, but you're often very different from that comparison as well."

I often get asked to make player comps. It is a favorite question in the AQA threads and I get a lot of email asking questions like that.

Sometimes there is a very obvious comp, or one that just comes to mind easily, but more often than not I end up being stretched to find one. There is also a difference in my mind between a tools comp (Prospect A is physically similar to Player B), and a performance/production comp (Prospect X should produce numbers similar to Player Y). These seem like they should be the same thing or at least closely related, but they aren't always.

I think this is especially true for pitchers. A couple of years ago, I was talking with a front office person and he asked me to come up with a comp for one of the pitchers in his organization. I came up with what I thought was a good comp, based on the guy's style of pitching and the numbers I expected him to put up, but the front office guy thought my comp was not at all accurate.

As we talked about it, it turned out that we were talking about two different types of comparisons. The two pitchers in question were of similar size and both had hard sinkers, but he pointed out how different the two pitchers were mechanically, and that one used a slider instead of a curve, while I was thinking more of the production expected.

So, the question for discussion is this: how valuable do you, personally, find comps? Would making a distinction between a tools comp and a performance comp be a valuable thing to do, or would it just muddy the waters and make things more confusing?

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Comps usually blur more than they illuminate

If I want to project a player I prefer to come up with statistical ceilings, floors and expected production and to provide specific analysis of qualitative risks, etc.

As most people use comps they tend to blur the projection because they don’t precisely define what they are comparing and what they are not.

A good, recent example of the tendency to blur with comps might be Yu Darvish, whom drew comps with other Japanese League pitchers. There was a comparison to be made based on workload and the approach of hitters but of course there were many things that weren’t readily comparable; Size, arm strength, fluidity of motion, control, age, command, etc.

by Rotofan on Feb 14, 2026 5:55 PM EST reply actions   1 recs

Ha, you beat me to it

I was so unhappy with the Matsuzaka comp that I started looking at Verlander because he’s closer physically at 6’"/225.
Darvish starts the year at 25 with 1,300 innings under his belt. Verlander had almost 1,200 innings at the same age.
Neither comp is fair to Darvish but it eased any fears I had about pitcher abuse and the exercise was useful to me for the exact reasons you caution against.

Faced with the choice between changing one's mind and proving that there is no need to do so, almost everyone gets busy on the proof. -John Kenneth Galbraith, economist (1908-2006)

by chewbalka on Feb 14, 2026 6:22 PM EST up reply actions  

By all reports ...

Darvish’s innings were much better managed than Dice-K’s … any comp to him is just lazy.

by Traindogger on Feb 14, 2026 7:03 PM EST up reply actions  

PS ...

In answer to the question, I don’t find comps that useful at all, but I agree with the below post that the casual fan may find them more appealing.

by Traindogger on Feb 14, 2026 7:04 PM EST up reply actions  

Yeah, I liked the next point by Frag as well

Faced with the choice between changing one's mind and proving that there is no need to do so, almost everyone gets busy on the proof. -John Kenneth Galbraith, economist (1908-2006)

by chewbalka on Feb 14, 2026 8:07 PM EST up reply actions  

Idon't like comps

But I think they do have scouting purpose at least with veteran scouts who may have seen player-x while he was younger and can identify features that make them similar while at the same stage of development.

I find statical comps just as hard as body/“eyes” comp because even then there are discrepancies that might adversely affect whether a player produces at the level the comp has the ML level.

Latin American scouts are infamous for comps. I don’t like comps on a 16 y/o because we don’t how he’s gonna grow or whether he’s gonna grow at all.

In short I don’t like comps at all.

XandyMan Coming for you!!!!1

by DominicanDandy on Feb 14, 2026 6:41 PM EST reply actions  

I think comps are more valuable to the casual fan

At the beginning of my studies of prospecting comps were any easy way to understand the skillset and potential of a player, but now that I’ve learned more I want to hear more about specific attributes rather than just a be-all end-all player comparison. Comparisons are fun and I think they have their place, but they’re never perfect, and I think they’re more useful in football and basketball draft prospects who are easier to project.

by kyuss94 on Feb 14, 2026 6:54 PM EST reply actions  

I only do comps for fun or if it's really obvious

There are some prospects that easily remind me of a certain big leaguer, and some where I could say what their upside (more upper quartile than absolute ceiling), middle, and floor (excluding not making to the MLB) potential. An example below:

Adeiny Hechavarria:

Upside: Alexei Ramirez
Middle: Alcides Escobar/Adam Everett
Floor: John McDonald

Not that I expect everyone to agree to that, but you get the picture.

There are others I just cannot come up with a comparison for.

"We are all agreed that your theory is crazy. The question that divides us is whether it is crazy enough to have a chance of being correct."
- Niels Bohr

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by Frag on Feb 14, 2026 7:26 PM EST reply actions  

I came up with ones for d'Arnaud and Gose, as well

d’Arnaud:

Upside: Miguel Montero
Middle: Kurt Suzuki/Yorvit Torrealba
Floor: Jeff Mathis (Pretty obvious, considering this has been pretty much been talked about here already)

Gose:

Upside: Devon White
Middle: Austin Jackson/Drew Stubbs
Floor: Carlos Gomez

Those are the only ones I could do that for so far, however.

"We are all agreed that your theory is crazy. The question that divides us is whether it is crazy enough to have a chance of being correct."
- Niels Bohr

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by Frag on Feb 14, 2026 10:58 PM EST up reply actions  

But anyway

I more do these for fun rather than as a way to gather information about a prospect. I like to look at scouting reports, clips, stats, and, if given the opportunity, live action play.

"We are all agreed that your theory is crazy. The question that divides us is whether it is crazy enough to have a chance of being correct."
- Niels Bohr

Sorry, unauthorized hotlinking of copyrighted material not permitted.

by Frag on Feb 14, 2026 11:00 PM EST up reply actions  

D'Arnaud

His upside is much higher than Miguel Montero and his middle is not as low as Suzuki/Torrealba

by sportsfreak2744 on Feb 15, 2026 1:49 AM EST up reply actions  

"much higher" makes it sound like D'Arnaud's upside is Carlos Santana.

Montero is generally regarded as a top 8 catcher and Suzuki was top 10 ten for a couple of years so Frag’s comps are perfectly reasonable and even complimentary.

Faced with the choice between changing one's mind and proving that there is no need to do so, almost everyone gets busy on the proof. -John Kenneth Galbraith, economist (1908-2006)

by chewbalka on Feb 15, 2026 3:52 AM EST up reply actions  

HIs upside is higher than Santana

Santana is a bad defensive catcher who has pop and a great eye, but he won’t hit for the average of D’Arnaud.

Big Sexy

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by King Billy Royal on Feb 15, 2026 2:27 PM EST up reply actions  

I don't like them

If one was to compare a prospect to, lets say, Mike Cameron (a very common comp for a African-American centerfielder with contact issues), I would prefer to hear the type of hitter, rather than comparing two names. For example, a .240/.340/.440 hitter with good defense and stolen bases.

by MilesC on Feb 14, 2026 10:23 PM EST reply actions  

+1

i like to hear about comps in terms of production

the triple slash example is good

when i think about defense, usually i just put them into general bins of -10/-5/0/5/10

and i also like to hear about how a prospect comps/projects in terms of BB% and K%

by blue bulldog on Feb 14, 2026 11:18 PM EST up reply actions  

Love the cookie monster bit to go with it

Great sense of humor, as always, John.

The 2008 Rogelio Moret League Fantasy Baseball Champions!

by The Congo Hammer on Feb 14, 2026 11:35 PM EST reply actions   2 recs

Agreed

How can you not love that video? The only thing it’s missing is Guy Smiley…

I'm not sayin', I'm just sayin'

by mikel1218 on Feb 15, 2026 12:19 AM EST up reply actions  

Here's a question...

How are comps different than making predictions about a prospects future MLB stats? Isn’t giving someone a stat line based on developing skills just as unfair as comparing them to a current hitter or pitcher that puts up these numbers? How is saying a player has the potential to be an Ace or a #1 starter different than saying he reminds you of a certain pitcher who is a number 1 starter?

"I couldn't do that. Could you do that? Why can they do it? Who are those guys?"

by maxisagod on Feb 14, 2026 11:41 PM EST reply actions  

Because everybody is different. There is no copy of one player that would be true for another.

There are a lot of guys who have had very similar careers, but I doubt they were ever compared to each other when they were prospects (though I could be wrong). I would rather hear something like “he has the potential to steal 40+ bases while hitting for a high average but putting up low power numbers and walk rates” rather than “He is going to be Juan Pierre because he is fast, black, and has no power”

by MilesC on Feb 15, 2026 1:34 AM EST up reply actions  

I do think comps CAN be good

For instance, Radhames Liz to Daniel Cabrera was one of my personal favorites. It can often work for pitchers with very similar profiles. Once you realize comps are more of a ballpark predicted outcome than a carbon copy, you find many comps do hold water… many don’t, but such is the nature of prospecting.

I think the waters get muddied the more differences there are in a player, especially if you have to say “Joe lite” or “Joe but with more power and less speed”. For example, I don’t think you can really have a comp for Darvish or Cespedes since their situation and performance is completely unique. But if in 10 years a very similar pitcher and hitter from Japan and Cuba come along with similar physical and statistcal profiles come along, I would not hesitate to use the comp.

The 2008 Rogelio Moret League Fantasy Baseball Champions!

by The Congo Hammer on Feb 14, 2026 11:41 PM EST reply actions  

Comps make life easier

I think comps are very useful in the preliminary stages of player assessment. In a sense, it sets a frame of reference as a starting point. It gives a baseline for tools and/or performance instead of starting with a blank slate. Then you build upon or detract from the specifics within the comp. The pitfalls of comps come when expectations enter the equation and when a prospect is deemed a failure when he detracts from the player with whom he was compared.

Dustin Pedroia’s tools… immediately you get the image of a hard-nosed gamer. So when you hear Cory Spangenberg being compared to Pedroia, you have a nice starting point for assessment. It’s the broad strokes of the type of player he is. Then you can focus on Spangenberg’s intricacies.

As for performance comps, I believe these are best used as a sort of shorthand language amongst baseball enthusiasts. Simply, saying a prospect has the ability to put up Adam Dunn-type numbers easily conveys tons of stats in only a few short words, as opposed to saying that same prospect has potential for 40 homeruns, 100 walks, 100 strikeouts, etc.

So, as long as comps aren’t used retrospectively to evaluate whether a prospect conformed to his comp, they’re pretty much a convenient way to convey thoughts on a player.

by scarletknight17 on Feb 15, 2026 2:53 AM EST reply actions  

Performance Comps

I would find them incredible helpful, giving us an idea of what to expect in a career for a given player if things go right.

"Hello. My name is Matthew Berry. I am on a Fantasy Jihad. Prepare to die!"

by Dominatio on Feb 15, 2026 8:44 AM EST reply actions  

agreed....

I understand that when a comp is given that is usually best case scenario. It is impossible to account for injuries, poor handling, poor makeup or drug abuse. As boozer said below, it is for fun. It isreally cool when they live up to expectations.

by rookie319s on Feb 15, 2026 12:00 PM EST up reply actions  

I like them...

but people get too worked up about them.
Keith Law compared Matt Szczur to Juan Pierre and Cub fans flipped out about it because they think Szczur can hit 8-10 more homers a year.
I like to look at minor league avg/obp/slg line, then subjectively adjust based on walk rates, strikeout rates, iso, babip, and SB/CS to come up with a comp. It’s fun for me, but I don’t get all worked up about it.

by Boozer10 on Feb 15, 2026 10:14 AM EST reply actions  

Part of the problem

Is that some people use comps to compare skill sets/tools. Others use comps to compare body types (classic example of that was Dominic Brown to Darryl Strawberry). Without the context of what the comp truly means, things can get blown way out of proportion very quickly.

by guru4u on Feb 15, 2026 2:07 PM EST reply actions  

comps

I think they’re good…if they weren’t good, why would teams do them? They play a role but only within the right context.

So many of the writers we read for prospect news say they don’t like to make comps and I think part of the reason is that many fans are stupid. They’d read a Rendon/Longoria comp as, “OMGOMGOMG…Rendon is the next Longoria!!!!!” because a lot of people are, well, stupid.

by Dorn on Feb 15, 2026 2:48 PM EST reply actions  

I'm high on statistical comps and low on body type/tools comps.

I think it is downright silly to expect that two people should be the same type of baseball player because they happen to be shaped similarly or have the same foot speed, arm strength, etc. There’s a lot more to it than that.

by reillocity on Feb 16, 2026 12:21 PM EST reply actions  


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