DETROIT -- A's reliever Eric O'Flaherty was activated from the disabled list in time for Tuesday's series opener in Detroit, giving the club a second left-hander in its bullpen next to Fernando Abad.
Right-hander Angel Castro was optioned to Triple-A Nashville to make room on the 25-man roster.
O'Flaherty missed 29 games with a strained left shoulder after struggling to the tune of an 11.57 ERA in eight appearances in April, but he still refuses to use it as an excuse.
"Sometimes you just suck," said O'Flaherty, smiling. "If you go out there and pitch, it's your job to get the job done.