Mariners' Arquimedes Caminero: Added to 25-man roster

Caminero was recalled from Triple-A Tacoma on Monday, Shannon Drayer of MYNorthwest.com reports.

Caminero is officially on Seattle's 25-man roster as Taijuan Walker was optioned to Triple-A Tacoma in a corresponding move. Caminero owns a respectable 3.51 ERA this season, but has struggled to keep the opposition off base as his WHIP and opponent batting average sit at 1.66 and .289, respectively.