From WordNet (r) 2.0 (August 2003) [wn]:
handoff
n : (American football) a play in which one player hands the
ball to a teammate
From The Collaborative International Dictionary of English v.0.48 [gcide]:
handoff \handoff\ n. (Football)
A football play in which one player hands the ball to a
teammate.
[WordNet 1.5]