Dressendorfer graduated from Pearland High School and was selected by the Baltimore Orioles in the 34th round of the 1987 MLB Draft, but opted to attend The University of Texas at Austin.

The team took the unique choice to draft four different starting pitchers, Dressendorfer the last of a cohort that included Todd Van Poppel, Donald Peters, and Dave Zancanaro.

[3] He started out with the Southern Oregon Timberjacks before making his Major League Baseball debut with the Athletics on April 13, 1991, pitching to a 4–2 victory over the Seattle Mariners, and appearing in his final MLB game on May 21, 1991.

Over the next 6 years, he bounced around the minor leagues, playing at times for Tacoma, Modesto, Arizona, Huntsville, Edmonton, and Albuquerque.

Dressendorfer was the Director of Baseball Operations & Outreach for the Round Rock Express, the AAA affiliate of the Houston Astros.