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"[Center fielder] Anthony [Gose] was doing a good job of letting me know where I was at," Upton said. "I knew I had room to jump, and I did. I was able to keep my concentration and get the ball."
Coghlan was rounding first base when Upton held on. He put his hands to his helmet in disbelief, denied what would've been his fifth home run of the year.
"I'm still bitter about it," Coghlan said after the game. "I know I was out. It's an F7."
Starting pitcher Mike Pelfrey smirked at his good fortune on his way off the field.
"It was a good play," Pelfrey said. "Obviously I've walked a lot of people, and I know that it was 3-1 [count] to Coghlan. I kind of threw a fastball and said, 'Here it is. Hit it.' And he hit it. Luckily, Upton made a good play on it."
The catch kept the game scoreless through the third, though the A's rallied for three runs in the next inning. The Tigers scored only one run in the game, a ninth-inning RBI double from Victor Martinez, but Upton at least kept a run off Pelfrey's line.
"You want to drop something in the bucket every day," Upton said. "I made a defensive play. Didn't do anything at the plate, but if I can save a run, that helps."
Jason Beck has covered the Tigers for MLB.com since 2002. Read Beck's Blog, follow him on Twitter @beckjason and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.