"I'm back to normal," Pineiro said, having thrown three innings and 45 pitches in an Arizona camp game on Wednesday in anticipation of a Minor League rehab start on Monday for Class A Inland Empire. "I'm looking to go five [innings] and 70 [pitches], which would be what I need to get to 85 or 90 [pitches] when I come back."
With an off-day on Thursday, Pineiro could be slotted in for a start on April 30 vs. the Rays in St. Petersburg.
"I'm back on my normal schedule," Pineiro said. "I've been watching these guys and I want to be part of it. These guys are pitching and playing great."
Pineiro, 32, was having an impressive spring -- 2-0, 3.46 ERA in 13 innings -- when he felt the back muscle near the lattisimus dorsi tighten on March 20 after throwing two innings against the Cubs in a Mesa, Ariz., spring camp game.
"I felt great the next day, but two days after that, I aggravated it throwing," he said. "I probably should have taken a little more time off to be sure. I've had some ups and downs with it, but it's normal now. I'm ready to go."
Lyle Spencer is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.