TULALIP — They were just three guys in rocking chairs, but their “Rock-A-Thon” to benefit Oso raised just slightly less than $1,000 at the Tulalip Cabela’s Aug. 2.

David Anderson, a.k.a. the “Old Guy,” explained that their six-hour fundraiser at the front entrance of the store would help purchase two engraved granite benches — one dedicated to the slide’s victims, the other to its first responders and volunteers — to install at Haller Park in Arlington.

“And we can’t get out of our chairs, eat or go to the bathroom until the end of the day,” Anderson said, even as he tested his bladder by drinking bottled water. “I’m trashing these other two guys, but it helps that I’ve got a ‘Give to the Old Guy’ sign to generate sympathy.”

Eric Allan, a.k.a. the “Funny Guy,” admitted that he’d made more money from people who asked him to stop telling jokes, but Darren Archuleta, a.k.a. the “Big Guy,” estimated he was catching up on Anderson.

While their portable stereo played rock songs with the word “rock” in their titles, Anderson invited community members to return to Cabela’s for their future fundraisers for the Oso slide memorial benches, including a barbecue Aug. 16-17 and a dunk tank Aug. 23-24. The three guys’ ultimate goal is to raise $5,000 to complete the project.