James Paxton

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Seattle Mariners starting pitcher James Paxton throws against the Colorado Rockies during the sixth inning of a baseball game, Wednesday, May 31, 2017, in Seattle. Paxton (AP Photo/Ted S. Warren)

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FILE - In this Tuesday, May 2, 2017, file photo, Seattle Mariners starting pitcher James Paxton throws against the Los Angeles Angels during the second inning of a baseball game in Seattle. Paxton is set to come off the disabled list for the Mariners against Colorado. Paxton (3-0, 1.43 ERA) was among baseball's best pitchers in April before landing on the DL with a left forearm strain. (AP Photo/Elaine Thompson, File)

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FILE + In this April 26, 2017, file photo, Seattle Mariners pitcher James Paxton throws against the Detroit Tigers in the first inning of a baseball game in Detroit. The Mariners will be without Paxton for at least a couple of starts after he was placed on the 10-day disabled list with a left forearm strain. (AP Photo/Paul Sancya, File)

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Seattle Mariners starting pitcher James Paxton throws to the Oakland Athletics during the first inning of a baseball game Thursday, April 20, 2017, in Oakland, Calif. (AP Photo/Marcio Jose Sanchez)

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Seattle Mariners starting pitcher James Paxton, left, is accompanied by a trainer as he leaves the baseball game against the Los Angeles Angels in the sixth inning Tuesday, April 8, 2014, in Seattle. Paxton strained a muscled in his left side, the team said. (AP Photo/Elaine Thompson)