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7/27/2014 9:55 P.M. ET

Kennedy to miss start; Lane joining Padres to fill in

ATLANTA -- Ian Kennedy will miss his scheduled start Monday against the Braves with soreness in his left oblique, though the team is confident that he will avoid the disabled list and will only miss this one start.

"It rates very low on the pain threshold, but we're going to err on the side of caution and not start him," said Padres assistant general manager A.J. Hinch.

Jason Lane, who made two appearances with the team earlier this season, will join the team for a spot start in the series finale at Turner Field.

San Diego manager Bud Black said, "We think it's a one-start thing," adding that Kennedy could slide into the rotation either Friday or Saturday at Petco Park against the Braves. He'll throw a side session on Tuesday or Wednesday.

Kennedy won his eighth game of the season Wednesday, holding the Cubs to three runs over six innings at Wrigley Field. He suffered the injury to his oblique, not making a pitch, but taking a swing, Hinch said. The injury was so minor that Black said that if he really had to, Kennedy could have started Monday.

In fact, Kennedy has been able to play catch on the side in Atlanta this weekend.

Instead, the Padres will be cautious with Kennedy who has thrown the second-most innings on the team (135 2/3) this season, making all of his 22 starts to this point, posting a 3.66 ERA.

Kennedy's injury was announced by Hinch to erase any speculation that this might have to do with him being on the trading block in advance of Thursday's non-waiver Trade Deadline.

"He's a well-sought after pitcher … because of his talent and years of control and what he can bring to a team," Hinch said. "Whether we continue to discuss him or are open to moving him … will lead into the Deadline. I don't really want to comment on his trade status. Teams like him, we like him.

"But this particular reason for not having him pitch has to do with what's best for the player."

Lane, 37, tossed 4 1/3 scoreless innings over two games with the Padres in June. He has a 4.67 ERA with Triple-A El Paso this season in 19 starts. Lane spent seven seasons in the Major Leagues as an outfielder with the Astros and Padres from 2002-07.

Quentin heading to DL; Gyorko coming off

ATLANTA -- The Padres' ever-changing clubhouse, reshaped by two notable trades this month, will take on a different look again on Monday.

Jason Lane will be recalled from Triple-A El Paso to start in place of Ian Kennedy in the series finale against the Braves at Turner Field.

Kennedy has a sore left oblique that won't require a disabled list stint, so the team will option infield Brooks Conrad to Triple-A El Paso. Conrad hit .100 in 30 at-bats with the Padres in 13 games.

The team will, however, place outfielder Carlos Quentin on the 15-day disabled list with a sore left knee, said manager Bud Black. Quentin, who is hitting .177 this season, last played Saturday. He missed the first 39 games of the season with a bone bruise in his left knee.

To fill Quentin's spot, the team will reinstate second baseman Jedd Gyorko from the DL. He hit .294 in six games with El Paso on his Minor League rehabilitation stint and flew Sunday to Atlanta.

Gyorko missed 44 games with plantar fasciitis in his left foot. Prior to his DL stint, he hit .162 in 56 games with five home runs and 24 RBIs.

Earlier this month, the Padres traded closer Huston Street and, last week, third baseman Chase Headley, leaving the clubhouse without two familiar faces.

Cashner pleased with first bullpen session

ATLANTA -- For the first time since June 18, Padres pitcher Andrew Cashner got on top of a mound and did more than just throw 31 pitches on a warm afternoon in the visiting bullpen at Turner Field.

He actually astonished himself a little.

"I kind of surprised myself with my command," Cashner said.

Cashner has been on the disabled list since June 21 with right shoulder soreness. He might have been back by now, but he was slowed before the All-Star break, not because of his shoulder, but because of soreness in his neck.

Cashner took a notable step forward Sunday when he threw off a mound before the Padres faced the Braves at Turner Field. He threw fastballs and changeups and worked up a good sweat.

Cashner enjoyed every minute of it, mostly because this day marked a step toward his ultimate goal -- getting back into a real game.

"It felt good," he said. "It's been frustrating not being able to play, but we've had a lot of guys step up. It has been impressive."

What's next for Cashner? He hopes another bullpen session when the team returns to Petco Park next week and then a Minor League rehabilitation assignment soon after.

"I hope to be back soon -- sooner than they think, I'm sure," Cashner said, smiling.

Cashner is 2-6 with a 2.36 ERA in 12 starts. He also missed time in May with soreness in his right elbow.

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