That the FOTF couldn't have a LS diamond? If it could have been the REAL FOTF, this would have been my list. (Same idea as @ItsaCanesthing) Some of these are the FOTF, but some should, and aren't.
Orioles: Trey Mancini
Red Sox: Devers
Yankees: Judge
Rays: Meadows or Snell
Blue Jays: Vlad Jr.
Indians: Lindor
White Sox: Eloy/Tim Anderson
Tigers: Boyd
Royals: Merrifield
Twins: Cruz/Kepler
Astros: Altuve/Bregman
Athletics: Olsen/Chapman
Angels: Trout
Mariners: Seager
Rangers: Gallo
Marlins: Anderson
Braves: Acuna
Nationals: Scherzer, maybye SOto
Mets: Degrom, MAYBE Alonso
Phillies: Bryce
Cubs: Baez or Bryant (Rizzo would have been before KB and EL MAGO broke out)
Cardinals: Molina
Reds: Votto
Pirates: Bell
Brewers: Yelich
Dodgers: Bellinger
Giants: Posey
Rockies: Arenado
Diamondbacks: ketel, maybe Mad [censored]
Padres: Machado
Thoughts? Some of them are correct, but some of them I think should have been a diamond player. These are not the TRUE FOTF
Mariners: Seager