Complex sentence: Gainer was banned from attending the November 5th, 2006 playoff game versus the Calgary Stampeders at McMahon Stadium in Calgary, Alberta to prevent him from rallying the thousands of Roughrider fans that attended the game.
Split into simpler sentences: Gainer was banned from attending the November 5th, 2006 playoff game versus the Calgary Stampeders in Calgary Alberta. The reason for the snub to Saskatchewan's favourite rodent is to prevent him from rallying the thousands of Roughrider fans that attended the game.