DENVER -- "Up and down," doesn't quite do justice to Franchy Cordero's first stint in the big leagues.The rookie center fielder got off to a blazing start, batting .339/.383/.625 over his first 17 games. Then he fell off a cliff, with just one hit in 31 at-bats over his last

DENVER -- "Up and down," doesn't quite do justice to Franchy Cordero 's first stint in the big leagues.

The rookie center fielder got off to a blazing start, batting .339/.383/.625 over his first 17 games. Then he fell off a cliff, with just one hit in 31 at-bats over his last 10 games before he was sent to Triple-A El Paso at the end of June.

Now, Cordero is back for a second stint with the Padres, recalled Wednesday, as reliever Jose Valdez was optioned. The Padres are hoping for the two extremes to level out a bit.

"What he showed early on was his ability to hit baseballs hard all over the field," Green said. "He plays with a lot of energy, flies around the field, plays good defense. Those are positive things. As he progressed, they found some holes and attacked them very aggressively. He was punching out quite a bit, and the challenge is on him to adjust back to the rest of the league."

Following his demotion, Cordero batted .387 for the Chihuahuas with 11 extra-base hits in 62 at-bats. He also began seeing time at the corner outfield spots, and he played left field on Wednesday, going 0-for-2 in the Padres' 18-4 loss in Colorado. That said, Cordero will be back in center over the weekend in San Francisco.

Starting center fielder Manuel Margot is expected to be placed on the paternity list, potentially clearing room on the roster for Hunter Renfroe , who has been battling a neck strain and is eligible to return from the disabled list Thursday.

Cosart out for the season

Right-hander Jarred Cosart underwent arthroscopic surgery on his pitching elbow earlier this week. He's been ruled out for the remainder of the season, but is expected to be fully healthy by the start of the 2018 campaign.

Cosart also had his 2016 season halted because of an elbow procedure, in which he had a bone spur removed. He's posted a 5.58 ERA in 16 appearances since coming to the Padres last July in the Andrew Cashner trade.

Solarte on the mend

Yangervis Solarte is approaching a rehab stint, as he's begun to swing freely from both sides of the plate. The veteran second baseman has been sidelined since late June with a left oblique strain. He's overcome the hurdle of swinging from the right side, a tricky proposition, given his injury.

"There's one or two movements in the field, like when he's turning to pivot, where he can still feel it just ever so slightly," Padres manager Andy Green said. "We want to see that resolved before we send him out for a rehab assignment. But I think he's getting closer and closer."