Imagine, just for a second, that Shaum Marcum makes it back this season. Some say the possibility exists. So imagine Marcum, sitting at home for a year, getting amped about playing baseball again. He works out, he runs, he focuses on conditioning and taking care of his expensive new body part.
So new/fit/hungry Shaun Marcum is ready for the stretch drive. (P!) Having worked diligently with the Jays staff and decides to ditch the curveball he doesn't throw often. He works on his mechanics to reduce strain on his arm, making his move to the plate a little free-er and easier.
So increased attention to fitness plus better mechanics equals a couple miles an hour on his fastball right? Maybe he starts throwing a little harder but his incredible change up stays just as deadly? Maybe he's now a speed changing force! Maybe he's the secret weapon during the race to the finish line!! Maybe I have a boner!
Don't rush Marcum, but don't drag your damn feet either.