BALTIMORE -- A's right-hander Paul Blackburn was forced out of what was shaping up to be an excellent start against the Orioles on Tuesday night after getting drilled by a comebacker in the fifth inning.
Trey Mancini's leadoff line drive appeared to nail Blackburn on his pitching arm. Blackburn was immediately tended to by a trainer, who accompanied him off the field.
Right-hander Simon Castro was summoned from the bullpen to pitch in place of Blackburn, who had yielded just two other hits to that point, holding Baltimore scoreless.
Jane Lee has covered the A's for MLB.