Anderson (elbow) will join Triple-A Durham for his next rehab appearance Thursday, the Associated Press reports.
The hard-throwing right-hander was unsurprisingly impressive over two rehab appearances with the Rays' rookie-level Florida Complex League affiliate, firing a pair of scoreless innings during which he recorded four strikeouts. Triple-A bats will therefore represent a nice bump in competition for the 31-year-old, who continues to track for activation some time in the first half of August.