Cobb (elbow) was transferred to the 60-day DL on Sunday, Marc Topkin of the Tampa Bay Times reports.
It's just a procedural move for the Rays, who likely aren't expecting Cobb to make his return from Tommy John surgery until late July or early August. Cobb's placement on the 60-day DL will open up a roster spot for reliever Jhan Marinez, who had his contract purchased from Triple-A Durham.