Pinch-hitter Jason Giambi connected for a two-run homer with two outs in the bottom of the ninth inning, and the Colorado Rockies beat the Arizona Diamondbacks 4-2 on Sunday to extend their winning streak to 10 games.
Giambi's walkoff HR lifts Rockies to 10th in row
Seeded on Sun Sep 12, 2010 7:11 PM EDT (NBC Sports)


Where did the term "walkoff homerun" come from? This is the first year I have heard it used.