Garton was optioned to Triple-A Durham on Thursday, Marc Topkin of the Tampa Bay Times reports.
Garton was called up in late May and played in five games with the Rays, posting a 5.40 ERA and 2.00 WHIP during five innings of work. He will go back to Durham where he has touted a 2.38 ERA with a 29:6 K:BB in 22.2 innings, while holding opposing batters to a .258 average. The 26-year-old was knocked around during his first stint at the major league level, but he could be back up with the Rays later on this summer. Tampa Bay will add another pitcher to their roster Thursday or Friday.