McClanahan exited Thursday's start against the Royals in the fourth inning with an undisclosed injury, Marc Topkin of the Tampa Bay Times reports.
One of the team's trainers went to the mound along with manager Kevin Cash. There was a brief conversation with McClanahan before he was pulled, but no further details are currently available. He allowed two runs on four hits with three strikeouts and two walks over 3.2 frames prior to his exit.