Raiders left tackle Donald Penn probably won’t get a contract extension for Christmas, but he knows it’s more important to give than receive, anyway.

On Monday night, he hosted “Shop With a Jock” at an Oakland Walmart Supercenter, giving 25 needy kids a $200 shopping spree. Seventeen of his teammates were on hand to help the homeless, neglected and abused kids from the East Oakland Youth Development Center fill their carts.

“These kids had a ball,” Penn said. “A lot of the kids went over (the limit) and my teammates went into their pockets. I appreciate them for doing that.

“To see those kids smile made it all worthwhile.”

Walmart provided the kids dinner as well.

Penn has brought over the events his foundation held when he was with the Bucs in Tampa Bay, taking last year off so he could get acclimated to his new team and the Oakland area.

“I like to give back,” Penn said, “and I am glad I am in a position to give back.”

Last month, Penn and the offensive linemen had a turkey-dinner giveaway for needy families.

Penn and his wife, Dominique, started the Donald Penn Foundation in 2009 to help inner-city and low-income youth in Los Angeles, where he’s from, and it has spread to the Tampa Bay area and now Oakland.

The foundation also provides education incentives to students throughout the school year, as well as scholarship opportunities.

“I just want to help out kids,” Penn said. “Kids can’t go out and get a job and make money to improve their situation. Adults can do something on their own, but it’s a lot harder for kids. Sometimes life is unfair to them, and my foundation wants to help them out as much as we can.”

Penn, 32, is a free agent at the end of the season, and has played very well his two years with Oakland. He grew up a Raiders fan in Los Angeles and hopes to retire in the Silver and Black.

Though the team last week extended the contracts of receiver Michael Crabtree and fullback Jamize Olawale, the ongoing dialogue between Penn’s agent and the Raiders has been purely about mutual interest and not numbers.

“I am excited that we are turning this thing around, and I want to be there when we get back to the Super Bowl,” Penn said. “They know that, and I think they want me here, too. It’s all going to work out.

“Right now, we’re just focused on getting some more wins this season.”

New long snapper: The Raiders signed long-snapper Thomas Gafford and placed two-time Pro Bowler Jon Condo on injured reserve. Condo hurt his shoulder recovering a fumble in Denver on Sunday. Gafford, 32, was the long snapper for Kansas City from 2008 through 2014, and was briefly with the Bears this season.

Condo snapped twice on punts after he dislocated his shoulder Sunday.

“His first snap (we practiced on the sideline) went into the coolers and I thought, ‘Uh-oh,’” punter Marquette King said. “Coach is like, ‘OK, you’re going to have to punt real fast.’ One of his arms couldn’t really move. I had to shorten up my distance to 11 or 12 yards and as soon as I touched the ball, I got it out as fast as I could.”

Position envy: Defensive linemen were especially jealous of the offensive linemen when they came back into the locker room after Tuesday’s walkthrough. Quarterback Derek Carr bought each blocker on the roster a 55-inch flat-screen television for Christmas, and the boxes were waiting by their lockers.

Vic Tafur is a San Francisco Chronicle staff writer. E-mail: vtafur@sfchronicle.com Twitter: @VicTafur