Blackburn (0-1) gave up seven runs on five hits and two walks and struck out two in 2.1 innings in a loss to the Mariners in Game 2 of Saturday's doubleheader.
Blackburn was the 29th man for the doubleheader, and he wasn't able to deliver a positive start. That forced the bullpen to absorb 3.2 innings of play. Blackburn hadn't pitched in the majors since last September, and it's likely the right-hander will return to the alternate training site after Saturday's uninspiring effort.