"My arm feels great," said Humber, who threw 63 pitches. "This past [start], my fastball command was pretty much where I wanted it to be. That was really what we were going for this start. The first one was just to make sure you feel good.
"I threw sliders for the first time, so that was a good step, too. I feel like I'm healthy and it's just a matter of I don't know what the schedule is going to be here with the All-Star break and everything. I might have to make another start. But if I do, really the main thing I want to work on next is the command of my offspeed pitches."
Humber wouldn't be needed until July 16 or 17 in Boston, so he could make a third Minor League rehab start. Manager Robin Ventura indicated that would be the plan for the veteran right-hander, who threw the 21st perfect game in Major League history on April 21 in Seattle.
"They said there was nothing that hurt or felt strange," said Ventura of Humber's start.
"I'm anxious to get back here and pitch in a big league game, but I don't know what the plan with that is," Humber said. "I haven't even talked to [White Sox head athletic trainer] Hermie [Schneider] or [White Sox pitching coach Don Cooper] yet."
One more start will allow Humber to build up his pitch count and endurance for a White Sox return.
"It hasn't been an endurance problem this year, but it's been more of having to make good enough pitches to go seven innings," Humber said. "Hopefully, when I get back, that's going to change. I definitely feel like I'm throwing the ball a lot better. I don't know what the results are going to be, but I definitely feel like I'm throwing the ball a lot better."