Coming back from offseason elbow surgery, he entered with an average fastball velocity of 90.2 mph this season, according to fangraphs.com.

WSJ: Yanks beat Boston 4-1 as Teixeira, Youkilis return

Kemp drove a 2-0 fastball, clocked at 95 mph, toward the right-field corner where a security guard stationed at the foul pole tried to catch the ball just behind the wall.

WSJ: Dodgers blow lead in 9th, lose to Mets 7-3 in 10

Armed with an average fastball and little breaking stuff, he's posted a 2.06 ERA since 1996, while averaging over 30 saves a year.

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