And that was enough for Luebke, who is working his way back from two Tommy John surgeries in a 21-month stretch. Luebke, 30, last pitched in a game in April of 2012.
Luebke estimated that he threw close to 30 pitches, all fastballs, at about 50-percent intensity Sunday. He'll repeat this in three or four days, and throw bullpen sessions for the next month, increasing both the length and intensity before moving on to throwing to hitters.
This, though, was a notable step forward in his recovery from his second elbow reconstructive surgery on Jan. 31 of last year. The first surgery was on May 23, 2012, but that graft didn't take.
"It went well. We wanted to make sure we got through it with no pain and we accomplished that," he said. "I tried not to let it go too much but at the same time I wanted to get my work in and get my feet wet again. It was good to get the rust out.
"It's been going on three years. It's the first time I've thrown on a mound without pain in a long time."
Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.