In what has become a bit of an unfortunate theme of this season, another promising Twins pitcher has landed on the injured list. Rookie left-hander Kendry Rojas was officially placed on the 15-day IL on Friday with inflammation in his pitching elbow. Rojas, 23, was just starting to find a groove in the big leagues. He had thrown seven scoreless innings with three hits, two walks, and six strikeouts over his last two outings. For the season, the Twins' No. 10 prospect has a 1.26 ERA in 14.1 innings across five appearances, with 14 strikeouts but also a somewhat concerning 10 walks. Hopefully this is nothing more than mild inflammation for Rojas, who the Twins acquired along with Alan Roden in the Louis Varland trade with the Blue Jays last summer. The young Cuban has a big-time fastball and a couple offspeed pitches that have shown promise, but he has work to do when it comes to the command of his arsenal. Kendry Rojas has such a nasty changeup. He fooled Mickey Gasper for his 3rd K.…