[NoOne]

age/experience is a factor, but not a 1:1 cause/effect.

i've seen enough struggle, hold their own, and excel. this is something you'd need to track and see if it exists, your eye is not good enough.

my guess: a rookie is more volatile but not necessarily more prone to success or failure based on whether they pitch or bat. success/failure still comes down to ratings. the better they are the less likely you notice this effect => better %'s of avoiding failure regardless of 1st year or 10th that remains the same major constituent of the force (use it luke!).

i've always read/heard a rookie pitcher has a bit of an advantage at first... if this is quantifiable and there's some sort of greater agreement upon it's assertions, then there's a good chance it's in the game. highly debateable andit's probably not in the game.. i've never read into it to see if it's good logic or just some nonsense. what people "say" is 50/50 nonsense. one human's observations about these things is not evidence... unless they used some tools/math/logic to aid their assessment.