The Rays have inked right-hander Michael Kohn to a one-year, major league contract, the club announced today. With the move, Tampa’s 40-man roster is now full for the time being.

Kohn, 28, elected free agency after being designated for assignment and outrighted in early September by the Angels. That move was confusing on the surface, as Kohn owns a 3.52 ERA across 76 2/3 frames since the start of 2013 and strikes out batters at a handy 9.2 per-nine clip.

But those numbers are not quite supported by Kohn’s peripherals; ERA estimators suggest that he may have benefited from a low home run-to-flyball rate and a .192 BABIP-against. At root, the concern with Kohn was his badly-slipping control. He ended up issuing 7.6 free passes per nine last year, including a troubling ten over his last 5 1/3 frames. Neither was the problem contained to his MLB time: Kohn walked 27 in his 34 Triple-A innings.