Qualls, who is in his first year as Arizona's closer, has experienced some right forearm tightness in the past week or so, and the club essentially shut him down for four days.
"He was a little bit sore, and I think at this time of the season, there's just no reason to push it, so we kind of have a scheduled plan to give him three or four days off," D-backs manager A.J. Hinch said.
Rather than have his status be uncertain and be tempted to use him a game, Hinch wanted to err on the side of caution and therefore made him off-limits for use.
"We leaned on him pretty heavily for a good seven or eight days there where he threw in six of the games," Hinch said of a stretch in which the D-backs had a pair of rainouts and an extra-inning doubleheader. "It was pretty taxing on a guy. It flared up on him a little bit and he felt a little discomfort. Not alarming other than wanting to get him up and running again."
Speaking of up and running, second baseman Felipe Lopez was in the lineup for the third straight game Monday after missing time with a tight left hamstring.
"He's going to have to play through this," Hinch said of Lopez. "He'll get more comfortable and confident in his running as he continues to play. I don't think he looks confident and comfortable, but at the same time, it's obviously playable and he can deal with it. Obviously, the more uncomfortable he looks the more nervous I get. He and I have been talking every day about it, and I think he'll be fine."Pitching matchup
ARI: RHP Dan Haren (4-4, 2.54 ERA)
Haren was outstanding against the Braves in his last outing. The right-hander helped an overworked bullpen by allowing just two runs over eight innings. Haren's control has been outstanding all season and his no-walk, eight-strikeout performance against the Braves was another example. In 71 innings this year, Haren has fanned 71 and walked just nine. Haren showed his ability to make adjustments and think along with hitters as he realized Chipper Jones was looking for an off-speed pitch in the third when he drove in a run with a double. So when Haren faced him with one on in the eighth, he threw him a fastball with two strikes and caught Jones looking. LAD: LHP Randy Wolf (3-1, 2.84 ERA)
His last time out, Wolf might have pitched his best game since returning to the Dodgers. He took a shutout into the eighth inning at Wrigley Field, chased by Bobby Scales' pinch-hit homer. To that point, he had struck out seven with one walk and allowed only one runner as far as second base. Wolf has throw six or more innings in his past five starts and entered his last start with seven no-decision in his previous eight starts. Tidbits
Hinch said he does not have any hesitation using rookie left-hander Daniel Schlereth in back-to-back games, but he would like to keep his pitch count at 25 or fewer. ... Infielder Chad Tracy understands why the team put him on the 15-day disabled list this weekend with a right oblique injury, knowing from past experience that those type injuries can be tricky. "It's feeling better," Tracy said. "I did it before, tried to play through it and got set back." ... Hinch almost put infielder Ryan Roberts in as catcher late in Sunday's game and said he would feel comfortable with him behind the plate if need be. Tickets
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Wednesday: Diamondbacks (Jon Garland, 4-4, 5.75) at Dodgers (Chad Billingsley, 6-3, 2.80), 7:10 p.m. MST
Friday: Diamondbacks (Max Scherzer, 2-4, 4.47) at Padres (Josh Geer, 1-1, 5.17), 7:05 p.m. MST
Steve Gilbert is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.