Hisashi Iwakuma has strained tendon

PEORIA, Ariz. -- Seattle Mariners pitcher Hisashi Iwakuma will not throw for four to six weeks because of an injury to the middle finger on his right hand.

Iwakuma reported for his physical Wednesday at the Mariners' spring training headquarters and has a splint over the finger. He's been diagnosed with a strained tendon and will be re-examined by a hand specialist in Arizona in three weeks.

The injury isn't expected to require surgery.

Iwakuma said he caught his finger as he tried to retrieve a ball from some netting while working out in Southern California on Jan. 20.

Iwakuma went 14-6 with a 2.66 ERA and 185 strikeouts in 2013.