Dierks Bentley will be competing in a celebrity pickleball tournament airing tomorrow on CBS. He started playing the game backstage to pass the time. "We started playing pickleball on the road, I guess, this year like a lot of other people did, as well," Dierks explains. "We would just put some masking tape, duct tape, down on the parking lot behind the busses and start playing and got into it. Definitely it's been a fun thing to do out there on the road." Jimmie Allen will also be competing in the tournament.