Dan began umpiring in 1965 and with the USSSA in the 1970s. Working mainly in the Joliet area, he umpired at all tournament and league levels of play while also doing many National Invitational Tournaments and State Tournaments. He also umpired at a USSSA 16-inch World Tournament held in Joliet.
According to fellow umpire Tim Johnson, “You could always depend on Dan to do his job and do it well.” He said, “I could always count on him because he knew the game. We called him Trigger because he was always in control of the game.”
Dan attended several state and national umpiring clinics to improve his umpiring talents and considers being able to umpire with his son Michael the highlight of his career.
He retired from umpiring in 2008.