 Knaster appeared on the October 14, 2010 episode of John Wants Answers to discuss baseball.Knaster is a stage actor who has appeared in many musical productions and played the lead role of Tevye in Fiddler on the Roof, and has written and performed his own show Adjacent to Greatness.Knaster was also the series editor for Addison-Wesley's "Macintosh Inside Out", a collection of 19 technical books published over a 3-year period in the 1990s.