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6/3/2013 4:05 A.M. ET

Gregerson to close in Street's absence

SAN DIEGO -- Setup man Luke Gregerson will serve as the Padres' closer while Huston Street is on the disabled list with a strained left calf.

Sometimes pitchers struggle to get over a mental hurdle between the eighth and ninth innings.

"I just think the biggest difference is controlling your emotions," Gregerson said. "Not letting the aspect of the ninth inning or that role of the closer get in your head. The aspect of those last three innings of the game are all very similar."

Gregerson pointed out that at times he'd have to go through an opponents' heart of the order in the eighth inning and the closer may get to face the seven, eight and nine hitters.

Gregerson handled his new role well on Saturday, recording his first save of the season, making him the first Padres pitcher other than Street to save a game this season.

The Blue Jays did score a run against Gregerson, snapping his personal 15 2/3 scoreless innings streak. Gregerson owns a minuscule 1.09 ERA in 25 games.

"They're all pressure situations at that point," Gregerson said. "So continue whatever it is you do in the previous innings and not let the mental side get to you of what the closer roles entails."

Erlin optioned after notching first victory

SAN DIEGO -- The Padres optioned left-hander Robbie Erlin back to Triple-A Tucson and recalled right-hander Brad Boxberger on Sunday.

The move came less than 24 hours after Erlin picked up his first career win in his first career start on Saturday, holding the Blue Jays to two runs in 6 2/3 innings.

Erlin also became the first Padres pitcher since A.J. Sager on May 9, 1994, against the Reds to not walk a batter in his first Major League start.

"What Robbie did last night did not surprise me, he's a good pitcher," said manager Bud Black.

Erlin will go back to Tucson, where he will continue as a starting pitcher. His start in the Major Leagues was necessary after the Padres used Saturday's regularly scheduled starter, Clayton Richard, when Friday's game lasted 17 innings. Erlin's deep outing Saturday and the addition of Boxberger should help replenish the Padres' bullpen.

This marks Boxberger's second stint with the Padres this season. He recorded two scoreless relief appearances after being recalled on May 2 and appeared in 24 games last season.

Boxberger took the loss against the Blue Jays Sunday in his first day back. Mark DeRosa tagged him for a solo home run in the 11th before the Blue Jays added two more runs. In his one inning of work, Boxberger allowed five hits and three runs.

Boxberger said he's been working on his mechanics.

"Just getting a consistent motion with my leg kick consistent and keeping everything compact," Boxberger said.

Boxberger is 0-3 with a 5.73 ERA in his 17 relief appearance with Tucson this season.

"He's a guy that has some experience with us, and we like his stuff," Black said. "He's still learning, he's not a finished product, but he's got a Major League arm. We think that he can help us here, but also grow at the same time with experience."

Quentin reversing course on slow start

SAN DIEGO -- Carlos Quentin looked fooled on the pitch, and all his weight was out on his front foot, but he was still able to drive the ball to left field and turn it into a double to lead off the fifth inning of Saturday's game against the Blue Jays.

Quentin followed that up with a rolling catch in the sixth inning to take a hit away from the Blue Jays' Adam Lind.

Things are starting to go right for Quentin, who went 2-for-3 with a walk and two doubles on Saturday. During the past 11 games, he's hitting .324 with a .429 on-base percentage. Seven of his 11 hits during that time have gone for extra bases (six doubles and one home run). Quentin's batting average stood at .222 entering Sunday's game.

"He's starting to show signs of the player that he is," manager Bud Black said. "I'm liking the swings he's taking, the bat speed's there. He's just missed some pitches over the past couple weeks, but he's also squaring some up, too.

"When he's right, he's a force. We need him right."

Worth noting

• On Saturday, Everth Cabrera became the first Padres player in history to have two RBI infield singles in the same game, at least since the data started being tracked in 2003.

Jamal Collier is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.