TABLE 8.

Differences in Specialization Based on Player Position^a

Position	Specialized, n (%)	P	Age of Specialization, Mean ± SD, y	P
Pitcher	391/887 (44.1)	.122	14.82 ± 2.33	.279
Starting pitcher	182/409 (44.5)	.8389	15.01 ± 1.81	.2154
Relief pitcher	209/478 (43.7)		14.66 ± 2.68
Infield	158/330 (47.9)		14.81 ± 2.40
Outfield	94/244 (38.5)		15.26 ± 2.10
Catcher	69/144 (47.9)		14.61 ± 1.96

^aAnalysis of variance: F _3,701 = 1.28; P = .279. P values listed for “pitcher” compare the results of all 4 positions (pitcher, infield, outfield, and catcher). The P values listed next to “starting pitcher” reflect the comparison between only starting and relief pitchers.