The Twins have designated Esmerling Vasquez for assignment, reports Joe Christensen of The Star Tribune. The move creates room on the 40-man roster for the recently claimed Darin Mastroianni.

Vasquez, 28, was claimed off waivers from the Diamondbacks back in September. He appeared in 31 games for Arizona last year, posting a 4.15 ERA with 5.9 K/9, 3.9 BB/9 and a 35.5% ground ball rate in 30 1/3 innings. The right-hander appeared in 50-plus games for the D'Backs in 2009 and 2010, when he posted higher strikeout rates, walk rates and ERAs than he did in 2011.