Buyer beware. At the start of this season (just ended) I picked up a 38 yo SP. Missed out on a max contract (the guy stayed with his previous team) and I needed an SP1. The player I got was the second best Type A available, and I had a lot of $$$ to blow, so I overpaid hoping my 20/20 training/medical would prop him up. Front loaded a three yr deal because by age 40 I will have his replacements ready to play in the majors.
However, over the course of his age 38 season he's lost three points off his OA. And it's not his physical ratings, stamina or velocity, it's his splits and pitches. The guy is still performing as my SP1, but nowhere of course near worth what he costs, and by the time the contract is up I might be lucky if he's still a very expensive LRA.