"The Mariners have finally made a move that goes beyond backups and bullpen arms, inking Japanese free agent pitcher Hisashi Iwakuma to a deal this afternoon.

Iwakuma, 30, will join Seattle's starting rotation this coming season, likely slotting in as a No. 3 arm behind Felix Hernandez and Michael Pineda. The deal is for one year, $1.5 million but there are an additional $3.4 million in incentives attached.

These incentives will be based on innings pitched, games started and awards.

The incentives kick in at 20 starts, where he'll be paid a $200,000 bonus. The bonuses keep accumulating every couple of starts after that. He'll get another $250,000 if he reaches 22 starts, then $300,000 if he hits 25 starts.

Iwakuma can make $400,000 in additional bonuses if he reaches 30 starts and another $400,000 for 200 innings pitched.

The innings-related bonuses begin at 140."