Doolittle was added to the Mariners' active roster Friday.

EDGE Analysis

The 34-year-old was claimed off waivers by Seattle on Thursday, and he'll join the major-league bullpen a day later after right-hander Wyatt Mills was optioned to Triple-A Tacoma. Doolittle made 45 relief appearances with the Reds before he was designated for assignment, and he posted a 4.46 ERA and 1.51 WHIP in 38.1 innings while converting just one of his five save chances.