Hirano spent the past two seasons with the Diamondbacks, posting a combined 3.47 ERA, 1.22 WHIP and 120:45 K:BB across 119.1 innings. While the Mariners don't necessarily have a proven endgame option, the veteran right-hander seems more likely to fill a setup role for Seattle. Ricardo Sanchez was designated for assignment to free up a roster spot for Hirano.
Mariners' Yoshihisa Hirano: Signs with Mariners
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