Joseph Henry Tiller was an American football player and coach. He was the head coach at the University of Wyoming from 1991 to 1996 and Purdue University from 1997 to 2008, with a career record of 126–92–1 (.578). Tiller was known as one of the innovators of the spread offense.

The spread offense is an offensive scheme in gridiron football that typically places the quarterback in the shotgun formation, and "spreads" the defense horizontally using three-, four-, and even five-receiver sets. Used at every level of the game including professional, college, and high school programs across the US and Canada, spread offenses often employ a no-huddle approach. Some implementations of the spread also feature wide splits between the offensive linemen.