Manager Kevin Cash says Tolleson will mostly likely open the season on the disabled list, Marc Topkin of the Tampa Bay Times reports.

EDGE Analysis

Tolleson has been plagued by back spasms throughout spring training and struggled upon his return to the mound, allowing four earned runs over just five innings pitched. It's unclear how long the right-hander will remain on the inactive list, but it creates a position to fill in the Rays' bullpen nonetheless. Austin Pruitt or Jaime Schultz - both of whom have impressed throughout camp - could be top candidates for the potential vacancy.