30 team league, basically no cap (255m), only one owner can own each player, and we get to keep the same season forever. So I'd always have Kelly's 16mil season. Or Cobb's 21mil season.
So replacement level is the 31st best catcher season, excluding any duplicates (so only one Piazza, one Cochrane, etc). And the 31st best CF (or 91st best outfielder)