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And hopefully Taijuan will naturally get into sinking and driving his weight more.
But ya, that's the spirit of the issue -- it's very unusual to see 96 mph out of a Greg Maddux throwing motion. You'd fret a bit about how well his arm would hold up.
There are some closers who throw like that, I'm sure.
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Stephen Strasburg had very little backwards load. The mechanics are quite comparable to Taijuan's, if you watch the video, except Stras gets a little better forward extension, and he's not as smooth throughout.
The "sample size" of one, isn't meant to guarantee injury for TJ, of course :- )
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Remember the #1 safety factor in pitching is, how hard do you throw? The harder you throw the safer you are.