Stanek was optioned to Triple-A Durham on Saturday, Marc Topkin of the Tampa Bay Times reports.
Stanek was likely unavailable to pitch Sunday after being used in each of the last two day, so he'll head back to the minors in exchange for a fresh bullpen arm. He produced a solid 2.45 ERA and 7:2 K:BB across 3.2 innings during his brief stint in the majors, so he should be back with the big club when additional bullpen help is once again needed.