My response would have been: 1) Are these representative of his ages 21-27 seasons? B) Are these representative of full seasons (>450 PA)? The answer to your question is "yes" (just as it would be for Brady Anderson). I believe your response to my questions is "no". guess what, his age 27, 28 season SLG% would be no different had he gotten 40 more at bats. he still played in 70% of games from age 25 on regardless of how many "plate appearances" he had. player A Age, Plate Apperances, SLG% 23yrs, 93 PA .239, 24 yrs, 53 PA .179, 25 yrs, 469 PA .420, 26 yrs, 614 PA .414, 27 yrs, 424 PA .405, 28 yrs, 404 PA .408, 29 yrs, 683 PA .617, 30 yrs, 655 PA .608, 31 yrs, 394 PA .534