- Dyed his hair blue for the role of Judas in a high school production of Jesus Christ Superstar.
- Made his film debut in 2001 cult favorite Donnie Darko. The film's lead, Jake Gyllenhaal, was a high-school classmate of Kranz's.
- Landed his first regular TV role with CBS sitcom Welcome to the Captain.
- Frequently works with Joss Whedon, acting in Whedon's Dollhouse, The Cabin in the Woods and Much Ado About Nothing.
- Played Bernard in Mike Nichols' 2012 Broadway production of Death of a Salesman.