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The thing about aging is this ... the speed at which the body repairs the micro-muscle tears slows down.
Without any question. At Ichiro's age, how many games per year was Rickey missing?
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All of which tells you why Wedge didn't pinch-hit last night and use Olivo for the 9th. That inning of catching might have had a profound negative effect on Olivo's "sawtooth" micro-tear healing graph.