- Lettered in baseball (third baseman) and football (quarterback) in college.
- Taught high-school English and coached high-school football in Chicago before becoming an actor.
- Wrote and directed the shorts Jedi Gym and Osama bin Laden: Behind the Madness.
- Met It's Always Sunny in Philadelphia creator and star Rob McElhenney in a coffee shop and convinced him to screen some short films he'd written and directed. This led to a role in the pilot for a Fox comedy called Boldly Going Nowhere.
- His 2012 cross-dressing sitcom, Work It, was pulled by ABC after two episodes.
- Parents are both celebrated educators and education activists in Illinois.
- A line of t-shirts and tank tops celebrate his Dale character from the cable drama Big Love.
- Martin Koldyke — Father
- Carl Koldyke — Brother
- Laird Koldyke — Brother
- Elizabeth Koldyke — Sister
- Patricia Koldyke — Mother
- Dartmouth College, Hanover, New Hampshire, United States (BA in English, 1991)