The 32-year-old missed the first five weeks of the season with a strained oblique, so getting back to top form will take some time. He said pitching two straight nights is normally no problem, but given that he missed the first 38 games to start this year, it will take some getting used to.
"Sore," Janssen said of his arm prior to Wednesday's game against the Indians. "The body's not used to working like that right now. It's something you go through during Spring Training, and because I didn't have much of a Spring Training, it's a shock to the body, those high-intensity pitches."
In addition to allowing his body to adjust to the rigors of pitching on a regular basis, Janssen said there's a mental aspect to recovery as well. He came into the game on Tuesday in a high pressure situation with a low margin for error as the Blue Jays tried to protect a one-run lead.
"I had to be sharp because one mistake can cost you the lead, and potentially the game," he said. "So it was good to get that first one out of the way for sure, and hopefully it'll all go back to the same old, just going out and pitching."
Jamie Ross is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.