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6/2/2014 10:00 P.M. ET

Cashner may return to Padres this weekend

SAN DIEGO -- Padres ace Andrew Cashner is on track to return from the disabled list this weekend after throwing 65 pitches in a simulated game at Petco Park on Monday afternoon.

Manager Bud Black said he thought the right-hander threw the ball well as he continues to work his way back from a right elbow injury.

"He was turning the ball loose -- fastball was good, and he threw all of his pitches," Black said. "He's not that far removed from a Major League game. If he feels good and ready to go -- knowing Cash, he'll be honest with us -- I don't think another [simulated] game will be needed."

Barring any setbacks, that would put Cashner on track to start against the Nationals in this weekend's three-game home series.

Cashner has tinkered with his slider grip and release, which is suspected to have caused the initial pain.

"I'm just kind of moving my fingers on the ball where I can't wrap it, [so I] stay behind the ball," said Cashner, who reported no discomfort and hopes to throw six innings in his first start back. "Hopefully we don't miss a beat when I come back."

San Diego could use Cashner's steady hand at the top of the rotation. The team has cycled through seven other starters since Cashner started in a 2-1 win against the Reds on May 13, and it will use an eighth on Tuesday night when Jesse Hahn makes his Major League debut. An arm injury also struck lefty Robbie Erlin after Cashner went down, forcing the Padres to give starts to long relievers Tim Stauffer and Donn Roach as well as Triple-A starter Billy Buckner.

Cashner has a 2.35 ERA in nine starts and 57 1/3 innings, racking up 47 strikeouts while walking 17 batters. He's only given up more than two runs once but hasn't received much run support, leading to his 2-5 record.

Hahn set to make big league debut in spot start

SAN DIEGO -- Jesse Hahn, acquired in an offseason trade with the Tampa Bay Rays involving former Padres utility man Logan Forsythe and current Padres reliever Alex Torres, will be called up from Double-A San Antonio and make his Major League debut against the Pittsburgh Pirates on Tuesday night.

The 24-year-old has been stretched out as a starter this season, making seven starts in 10 appearances with a 2-1 record and a 2.20 ERA. In his last start on Thursday, he earned his first win as a member of the Missions' rotation after giving up just one hit and striking out three in five innings.

"Our reports from our Double-A staff have indicated that Jesse has progressively thrown better as the season has went on," manager Bud Black said. "His last start was his best all season."

Black is confident that the right-hander could give the Padres six innings or about 90 pitches, despite not reaching either of those marks this year. Hahn impressed San Diego's coaching staff in Spring Training.

"We feel what we saw in Spring Training with Jesse was a Major League arm, big league stuff, good head on his shoulders," Black said. "Some of the other guys we considered, it just didn't quite fall on their day and maybe they hadn't pitched with the consistency that Jesse has pitched his last couple times out."

After undergoing Tommy John surgery in 2010 and laboring through the long, tedious recovery process, Hahn says he's ready to make a lasting impression in the big leagues.

"I feel great right now -- this is the best my arm has felt in a couple years," Hahn said. "I can't get a smile off my face."

After Missions manager Rich Dauer informed him he'd be making the leap to the Major Leagues, Hahn called his "biggest mentor" -- his father.

"He was just so pumped. He started going down the street and knocking on neighbors' doors," Hahn said. "He just told me not to change a thing, just keep pitching your game and things will work out for you."

Maybin, Medica still slowed by leg injuries

SAN DIEGO -- Padres outfielders Cameron Maybin and Tommy Medica were still considered day to day on Monday after sustaining leg injuries during San Diego's weekend series against the White Sox.

Medica, who left in the eighth inning of Sunday's game with a strained quad, appears closer to returning and was available to pinch-hit in Monday night's series opener with the Pirates at Petco Park. He's hitting .286/.327/.571 with three home runs and seven RBIs in 49 at-bats.

"He's gonna go through a few things this afternoon on the field and see what he can do tonight," manager Bud Black said. "But him being able to play defense or run the bases might be a little bit of a stretch. We're gonna see if we can use him in the batter's box and hit, and not put him in jeopardy of having any setbacks with the quad."

Maybin exited Saturday's game with calf soreness, which is still affecting him. The injury came just one day after he hit his first home run and picked up his first RBI of the season. He missed most of April with a torn bicep.

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