Morales, 31, is batting .234/.259/.325 in 39 games for Minnesota this season. His signing was delayed because of a tepid market for his services this winter. That Morales had draft-pick compensation attached to his free agency (he turned down a qualifying offer from the Mariners after the 2013 season) had much to do with that.
Across parts of eight big-league seasons, Morales is a career .277/.328/.470 hitter (116 OPS+). In 2009 with the Angels, he hit 34 home runs and finished fifth in the AL MVP balloting.
As for the M's, their DHs this season (primarily Corey Hart) are batting a fairly miserable .196/.277/.293. Since Morales over his career has been far more effective when batting from the left side, he could form a strong platoon with Hart, provided Hart rebounds at some point.
Meantime, Pryor, the 25-year-old reliever, has worked just 32 1/3 innings at the highest level, but he's posted a 139 ERA+ over that span. In the minors, he owns an ERA of 3.72 and a K/BB ratio of 2.22 across parts of five seasons. He opened the 2014 season on the DL after undergoing surgery to repair his right lat muscle. The Twins have assigned Pryor to Triple-A Rochester.