Twins optioned RHPs Deolis Guerra and Lester Oliveros, OF Darin Mastroianni and LHPs Scott Diamond and Tyler Robertson to Triple-A Rochester.

Guerra gave up five runs across three innings in three appearances this spring. The 22-year-old posted a 2.77 ERA and 65/13 K/BB ratio over 52 innings after being moved to the bullpen last year, so he could still be a useful piece down the line. Oliveros entered spring training with a legitimate chance to make the Opening Day roster, so it's a bit of a surprise to see him be sent down so soon. Look for the hard-throwing right-hander to pitch some innings out of the Twins' bullpen this season.