Masterson (shoulder) is scheduled to pitch three innings in a rehab start for Triple-A Pawtucket on Sunday, Tim Britton of the Providence Journal reports. Masterson figures to make multiple rehab appearances while trying to overcome shoulder soreness and his early-season struggles. Steven Wright has been better than Masterson so far, but it's hard to have much faith in Wright's continued success, and Joe Kelly has been a disaster. Masterson may thus get another shot in the big-league starting rotation, despite posting a 6.37 ERA and 24:19 K:BB ratio through his first seven outings (35.1 innings).