Disputing a player's first full season as "what he will always be, not good" is kind of blind
example, Brandon Inge
2004 (27 years old, Youk's age...) 13 HRs, 64 RBIs
2005 (28 years old) 16 HRs, 72 RBIs
2006 (29 years old) 27 HRs, 83 RBIs
Youk's 2nd half tailed off due to strain from his first full season in the majors, coupled with players arent comfortable with (moving to different spots in the order almost each game)