Saskatchewan Roughriders head coach Ken Miller and his wife Maureen walk out to a crowd of cheering fans at Mosaic Stadium on Monday, Nov. 30, 2009 in Regina, Sask. // Sports' most heartbreaking losses(THE CANADIAN PRESS - Troy Fleece)

Saskatchewan Roughriders head coach Ken Miller and his wife Maureen walk out to a crowd of cheering fans at Mosaic Stadium on Monday, Nov. 30, 2009 in Regina, Sask.

Poor, poor Riders fans. The Green People came to Calgary in droves and saw their team build up what looked to be a commanding 17-3 halftime advantage. But the Als scored two touchdowns in the latter stages of the fourth quarter to get back in the game, leading to a 33-yard field attempt by kicker David Duval for the win. Normally a sure thing from that range, Duval missed, sending Rider Nation into delirium. But of course, those celebrations were premature. Saskatchewan was called for too-many-men allowing Duval another chance to successfully boot the winning points. While Saskatchewan's gaffe loomed large, other players and teams sure have made some equally boneheaded blunders. Here are some of the most memorable losses in recent sports history.