Hisashi Iwakuma, 36, will be out four to six weeks with shoulder inflammation, the Mariners said Saturday. He was losing velocity and control in his most recent starts, and the Mariners sent him home from the road trip for an exam by medical director Dr. Edward Khalfayan.
The Mariners Saturday morning also called up RHP Ryan Weber from AAA Tacoma and designated reliever Jean Machi for assignment. Weber was to start at 10 a.m. Saturday when Seattle (17-19) plays the third of a four-game series at Rogers Centre in Toronto, where it lost the first two games 7-2 and 4-0.
Weber, 26, went 2-0 with a 0.85 ERA in six games (five starts) with Tacoma this season. He leads the Pacific Coast League in ERA. The 6-foot-1, 180-pound right-hander began the season allowing no runs in his first three games.
He was outrighted to Tacoma Dec. 2 after being claimed off waivers from Atlanta Nov. 2. He went 1-1 with a 5.45 ERA with Atlanta last season. In 26 games (five starts) with AAA Gwinnett, Weber was 2-3 with a 2.76 ERA.
A native of St. Petersburg, FL, Weber was drafted by the Braves in the 22nd round of the 2009 draft out of St. Petersburg College. He made his MLB debut with Atlanta Sept. 8, 2015 at Philadelphia. In parts of two seasons with the Braves, his record was 1-4 with a 5.15 ERA.
Machi, 35, made five relief appearances with the Mariners after being selected from Tacoma May 2. The 6-foot, 235-pound right-hander went 1-0 with a 1.17 ERA.