Kevin Sherrington: After sloppy win against Giants, will the real Cowboys please stand up?

ARLINGTON, Texas — What started Sunday as a sleepy, sloppy affair and ended in overtime as a slap-happy, sloppy win makes you ask just who these Jekyll-and-Hyde Cowboys are after two wildly disparate performances: The team that came within a couple drops of beating the defending world champs in Philadelphia? Or the one that needed extra innings to escape the shot-in-their-foot Giants, 40-37? ...