Cobb (elbow) will make his sixth rehab start with Triple-A Durham on Tuesday, Roger Mooney of the Tampa Bay Times reports.
Cobb was lit up his last time out, surrendering four earned runs on eight hits, including two homers, over three innings against Pawtucket. He'd yielded just two earned runs over the six innings encompassing his three prior appearances, so the poor outing may ultimately prove to be an outlier. The 28-year-old still retains a chance of a callup to the big league club before the campaign concludes.