Paxton, 28, was placed on the 10-day disabled list on August 11 with a strained left pectoral muscle.
Paxton left Aug. 10th game with a strained left pectoral muscle in the 7th inning against Los Angeles-AL. The left-hander has made 20 starts this season, going 12-3 with a 2.78 ERA (37 ER, 119.2 IP) with 138 strikeouts, including 7-0 with a 1.92 ERA (11 ER, 51.2 IP) with 59 strikeouts over his final 8 starts.
He was named American League Pitcher of the Month for July after going 6-0 with a 1.37 ERA (6 ER, 39.1 IP) with 46 strikeouts in six starts, becoming the first Mariners pitcher to win 6 games in a single month.
This was his second stint on the 10-day disabled list this season after also missing time with a left forearm strain from May 5 (retro to 5/3) to May 30. In parts of five seasons with Seattle, he is 30-18 with a 3.24 ERA (146 ER, 405.2 IP) with 391 strikeouts. He was drafted by Seattle in the 4th round of the 2010 MLB First-Year Player Draft.