He was a contestant on the first and third seasons of NBC's Last Comic Standing. He was fourth eliminated in the first season after losing in a head-to-head competition to Dat Phan, the eventual winner of Last Comic Standing season 1. He was first runner-up in the third season. On the show he was known for his great friendship with Rich Vos, with whom he was seen taking baths and ironing. Also notable was the "infamous" rat hunt where Dave caught a rat. He also has made guest appearances on The Tonight Show with Jay Leno and was in the 1999 movie Los Enchiladas as the bread delivery guy.
Mordal was the host of Wreckreation Nation, which first aired January 2009 on the Discovery Channel. While largely retired from his stand-up comedy career, he currently appears on-air weekdays as a personality on the national morning-drive radio ratings leader "The KQ Morning Show," on Minneapolis/St. Paul's KQRS-FM 92.5.
- "Hansen and the Stagebenders will be performing in Lake City". The Republican Eagle. February 21, 2011. Retrieved 1 March 2011.