"Fortunately, I was able to get through that at-bat and get the last out," he said. "It's done it the past couple of years, once or twice a year, and it's usually a day-to-day thing and nothing too major. We're doing treatments on it, and we'll just keep seeing how it feels each day."
Qualls didn't tell the team he wasn't available to pitch Thursday, but he hinted another day of rest could do him some good.
"That's what I would hope for," he said. "Veras did a great job last night, our bullpen has been throwing the ball well, and I take pride in being able to take the ball for the majority of my career whenever possible, so when little things like this pop up, I don't like not being available.
"I've only been on the DL one time when I blew my knee out [in 2009]. It's definitely not a DL thing. I take pride in being available every day, so I don't like being day to day. I like taking the ball. It's just frustrating. It pop ups here and there, but honestly it's not that big of a deal."
Brian McTaggart is a reporter for MLB.com and writes an MLBlog, Tag's Lines. Follow @brianmctaggart on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.