On-Base Perception

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Andy Pettitte still working hard

Andy Pettitte delivers a pitch during the first

Andy Pettitte delivers a pitch during the first inning of a game against the Kansas City Royals. (May 11, 2013) (Credit: Getty)

Those wondering how Andy Pettitte can still pitch at a high level would have had some of that answered if they were at the ballpark Sunday morning.

Pettitte, who turns 41 next month, arrived at Kauffman Stadium well before 9 a.m. with strength and conditioning coordinator Dana Cavalea, stretching and running on the warning track.

Tags: Andy Pettitte , Yankees , MLB , baseball

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