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8/3/2013 9:25 P.M. ET

Hynes takes over duties as Padres' lefty specialist

SAN DIEGO -- When the Padres traded reliever Joe Thatcher to the D-backs on Wednesday, they traded away one of the best left-handed specialists in the National League.

But they didn't trade away all of their lefty relievers, as rookie Colt Hynes now steps into that role after the team dealt Thatcher and Minor League pitcher Matt Stites to Arizona for starting pitcher Ian Kennedy.

"It's a great opportunity, and that's something Joe told me before he took off," Hynes said.

Hynes, who was promoted from Triple-A Tucson on July 14, hasn't pitched much at this level yet (5 1/3 innings entering Saturday), but he has retired five of the six left-handed batters he's faced with one walk and one strikeout.

"He's become our left-handed everything," Padres manager Bud Black said of the team's lone lefty in the bullpen. "But we have confidence in Colt in that he can get a tough left-handed hitter out."

That's something Thatcher had become very good at. Lefties were hitting just .212 against him in 2013. In seven seasons with the Padres, left-handed batters had a .209 average in 345 at-bats.

Hynes believes he can handle the job, and after adjusting his mechanics in Spring Training, he now throws from a lower arm slot -- a three-quarters delivery that offers deception to left-handed batters.

"I've heard [from hitters] that there's some deception in it," Hynes said. "For me, personally, it's easier to repeat my delivery that way and throw more quality strikes."

Sore right knee keeps Quentin out of lineup

SAN DIEGO -- Padres left fielder Carlos Quentin was not in the lineup for Saturday's game against the Yankees, as his right knee continues to bother him.

Quentin originally felt some discomfort on Sunday in Arizona, so he didn't appear in Monday's game against the Reds. He started Tuesday's game, but left prior to the sixth inning after two hitless plate appearances.

Originally the team hoped to sit Quentin on Wednesday, take the off-day on Thursday and then join the lineup on Friday, but the pain hasn't gone away.

Quentin took part in some outfield workouts before Saturday's game after sitting out Friday, and Padres manager Bud Black says a trip to the disabled list is unlikely.

"He's doing better," said Black, echoing his comments from Friday. "We'll see about his availability tonight in some form."

Quentin's absence has left the Padres without one of their best and hottest hitters. In the month of July, Quentin had four home runs and a team-best 20 RBIs.

Logan Forsythe -- who homered on Friday -- is replacing him in the lineup in left field, a night after he started in right field.

Quentin's knees have a history of troubling him. He had arthroscopic surgery on his right knee after the end of the 2012 regular season. The Padres have handled him with care this season, trying to give him extra rest whenever possible.

He adjusted his batting stance during the season -- which used to be more crouched and put more stress on his knee -- to a more upright position, and his productivity has taken off since.

Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. Jamal Collier is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.