Cowboys add Alex Tanney as camp arm

Five days ago, the Cowboys held a three-man Gong Show at quarterback.  On Sunday, the Cowboys declared a winner. Winning the check for $516.32 was Alex Tanney.  He joins Tony Romo, Kyle Orton, and Nick Stephens on the 90-man roster. Adding a fourth quarterback became critical for the Cowboys, given that Romo will have his…