Seattle Mariners preliminary prospect grade breakdown

I am continuing work on the Seattle Mariners Top 20 Prospects list for 2019. The first run through the grades gave the following results:

Grade A: Zero
Grade A-: Zero
Grade B+: One
Grade B: Two
Grade B-: Six
Grade C+: 25
Grade C: Everyone else

There’s a little play in the B-/C+ territory but the final results will be close to this. The conventional wisdom is that the Mariners system is very thin and the conventional wisdom is correct.

The names:

Ruben Alaniz, RHP
John Andreoli, OF
Dayeison Arias, RHP
Braden Bishop, OF
Sam Carlson, RHP
Damon Casetta-Stubbs, RHP
Joey Curletta, OF-1B
Joe DeCarlo, C
Sam Delaplane, RHP
Matthew Festa, RHP
Eric Filia, OF
Ivan Fortunato, RHP
Jake Fraley, OF
Joey Gerber, RHP
Logan Gilbert, RHP
Nolan Hoffman, RHP
Bobby Honeyman, 3B
Austin Hutchison, RHP
Cesar Izturis, Jr, INF
Anthony Jimenez, OF
Michael Koval, RHP
Kyle Lewis, OF
Luis Liberato, OF
Chris Mariscal, INF
Noelvi Marte, SS
Darren McCaughan, RHP
Keegan McGovern, OF
David McKay, RHP
Anthony Misiewicz, LHP
Ian Miller, OF
Wyatt Mills, RHP
Dylan Moore, INF-OF
Ljay Newsome, RHP
Joey O’Brien, RHP
Ryne Ogren, SS
Max Povse, RHP
Juan Querecuto, SS
Cal Raleigh, C
Joe Rizzo, 3B
Julio Rodriguez, OF
Joseph Rosa, 2B
Ronald Rosario, OF
Nick Rumbelow, RHP
Justus Sheffield, LHP
Josh Stowers, OF
Erik Swanson, RHP
Donnie Walton, INF
Rob Whalen, RHP
Chuck Taylor, OF
Logan Taylor, 3B-OF
Dom Thompson-Williams, OF
Art Warren, RHP
Evan White, 1B