Barrosa (hamstring) was optioned to Triple-A Reno on Friday.
Barrosa strained his hamstring earlier this month and will miss the first few weeks of the season, but he will reach Triple-A for the first time in his career once he's healthy. The 22-year-old outfield prospect slashed .276/.374/.438 with 12 homers and 51 RBI with Double-A Amarillo last season.