Chen was recalled from the rookie-level GCL Orioles to make the start Sunday against the Twins, Rich Dubroff of CSNBaltimore.com reports. Chen's deployment to the GCL was just a paper move to give the team an extra player for depth purposes in between the lefty's starts. The Orioles' rotation remains somewhat in flux heading into a probable postseason berth, but Chen looks like he's locked into a starting spot given his respectable 3.76 ERA, 1.25 WHIP and 109:28 K:BB ratio over 148.1 innings.