Probably not fair but it’s gonna be tough. Obviously Ohtani is the starter. I can’t see them carrying more than 2 so it would be between Seiya, Schwarber, Devers and possibly Hunter Goodman if Colorado needs an All-Star
Lets look at how they stack up:
fWAR: Schwarber 2.3, Suzuki 2.0, Goodman 1.9, Devers 1.9
wRC+: Schwarber 150, Devers 138, Suzuki 137, Goodman 123
wOBA: Schwarber .391, Devers .372, Goodman .368, Suzuki .367
HR: Schwarber 26, Suzuki 23, Devers 17, Goodman 16
RBI: Suzuki 73, Devers 64, Schwarber 58, Goodman 50
OPS: Schwarber .912, Suzuki .869, Devers .861, Goodman .857
Theres more we can look at but you get the picture. No one would have any gripes if Seiya got an All Star nod but if they are only taking 1 extra DH Schwarber kind of stands out from the crowd with Seiya and Devers a step behind and Goodman as the designated Rockies option