Mariners Hisashi Iwakuma out with injury |


Mariners Hisashi Iwakuma out with injury |」

TORONTO -- Seattles injury-riddled rotation took a deeper hit on Saturday as the club announced Hisashi Iwakuma will miss an estimated four-to-six weeks with inflammation in his right shoulder.

Iwakuma was scratched from his Thursday start in Toronto and instead flew back to Seattle for testing by team physician Ed Khalfayan.

Im optimistic its more toward the four-weeks side of things, said manager Scott Servais. But you never know. Its kind of surprising. I wasnt expecting it to be that long, but our doctors looked at him and thought it was best to put that time frame on him.

The 36-year-old has been one of the American Leagues better right-handed starters over the past six years with a 63-39 record and 3.42 ERA in 150 games (136 starts). The former Japanese standout was an American League All-Star in 2013, threw a no-hitter in 15 and was a 16-game winner for Seattle in 16, but hes 0-2 with a 4.35 ERA in six starts this season, and his velocity has been among the slowest in the Majors.