The Philadelphia Phillies placed ace Zack Wheeler on the 15-day injured list Saturday with a blood clot in his right arm, the team announced Saturday . The announcement was made following the team's 2-0 loss to the Washington Nationals .

Dave Dombrowski, the president of baseball operations for the Phillies, said Wheeler had been diagnosed with a "right upper extremity blood clot."

"There's not a lot that we can say on it at this time," said Dombrowski, who commended doctors for finding the clot. "It could have been a much more trying situation than it is."

Phillies head athletic trainer Paul Buchheit said Wheeler had been feeling better after some right shoulder soreness, but that changed Friday.

"He felt a little heaviness," Buchheit said. "So, the doctors here were great in he

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