By Andrew Holleran As the Dallas Cowboys and the Philadelphia Eagles battled on the field on Sunday evening, their fans went at it in the stands. A wild brawl broke out in the concourse of AT&T Stadium in Arlington, Texas on Sunday night. The Cowboys beat the Eagles, 33-13, on Sunday evening, but the real beatdown happened during this wild fan brawl. “Absolutely disgusting behavior last night at the Cowboys game.” Fan fights have become more and more common as of late. It seems like they got really bad once fans were allowed back into the stadiums following the pandemic. “There are rules,” Rog…