If he is not hurting then it's just the wear and tear. Everyone was worried about him getting hurt, but he's just losing some of his high octane gas. Nobody really remembers Barry Zito throwing 93-95 in his rookie year, 91-93 in his 2nd year, 89-91 third year, 88-90 4th/5th year...

Timmy is probably never going to be the 94-96 mph guy. He is gonna have to learn to pitch with a 89-91 mph fastball. It's amazing that slight build Pedro Martinez was able to throw 95-97 mph for a good 10 years before he started slowing down a bit.