Blas Castano: Everything you need to know

The Rockies claimed Castano off waivers Tuesday and optioned him to Triple-A Albuquerque. Castano was designated for assignment by the Mariners last week but will maintain a spot on a 40-man roster with the Rockies. The right-hander opened this season at the Triple-A level and has given up one earned run with a 4:1 K:BB across 6.1 innings.

The Mariners designated Castano for assignment Tuesday. Castano failed to make Seattle's Opening Day roster and has now lost his place on the 40-man roster. Despite the DFA, the 27-year-old had a strong start to the campaign at Triple-A Tacoma, allowing one earned run with a 4:1 K:BB across 6.1 innings out of the bullpen.

The Mariners optioned Castano to Triple-A Tacoma on Wednesday. Castano has yielded five runs with a 3:3 K:BB over five innings in five Cactus League outings. The 27-year-old will likely begin the season in the rotation at Triple-A Tacoma, but if he gets another shot with the big club, it could be as a reliever.