This is where COVID and other factors complicate projections.
Marsh only had about 1330 minor league PA, the norm is 2000-2500 for HS players.
He should have had 500 PA in AAA at 22, instead of 0, then got rushed to the majors at 23 after 110 AAA PA.
BB rate, 12.2% in A+, 11.4% in AA, 14.5% in his truncated AAA appearance.
Then drops to 7.7% with the Angels and 6.1% last season.
So there's room for improvement once he settles into an everyday role.
1.7 WAR in 461 PA (1.6 BR) with 89 RC+. So he's already a 2+ WAR starter (600 PA).
So if he can just make incremental improvements (up the BB%, reduce K rate from 35% to 25%, improve his play in CF by making better reads off the bat), he has 3+ WAR potential.