"I mean, I definitely wanted to be here, but it was more of a mental change than physical because the structure was fine in the arm. It was a matter of getting it feeling good again," Petricka added. "That was a tough little battle. But it's over and now let's have a good long season."
While Petricka returned, joining Carlos Rodon in further solidifying the White Sox bullpen, Javy Guerra was placed on the 15-day disabled list retroactive to April 13 with right-shoulder inflammation. Pitcher Kyle Drabek also was designated for assignment.
Guerra has not pitched since April 12, although he warmed up Saturday in Detroit. He described the soreness in his shoulder as nothing too crazy, probably a little bit of biceps tendinitis, but he has no timetable for return.
"It's early and you don't want it to turn in to anything too serious. We made the right choice, no matter what. Going forward, this is something we should take care of," Guerra said. "I think we'll do the right thing and make sure we get it healthy first."
The White Sox bullpen currently consists of David Robertson, Zach Duke, Zach Putnam, Petricka, Rodon, Matt Albers and Dan Jennings.
"Our bullpen looks real good," said Petricka, who believes he will get stronger as his workload progresses. "It's going to be a fun little stretch here."
Scott Merkin is a reporter for MLB.com. Read his blog, Merk's Works, and follow him on Twitter @scottmerkin. This story was not subject to the approval of Major League Baseball or its clubs.