Thatcher gave up two runs on two hits in his lone inning of work for Double-A Arkansas on Saturday.
"I was a little rusty," said Thatcher, who has a 3.00 ERA in 45 games with the D-backs and Angels this season. "But the main thing was the ankle held up. It's not going to be 100 percent the rest of the way, but I was able to get warmed up quick and get out on the mound. It went good enough to where I feel like I'm close."
Alden Gonzalez is a reporter for MLB.com. Read his blog, Gonzo and "The Show", and follow him on Twitter @Alden_Gonzalez. This story was not subject to the approval of Major League Baseball or its clubs.