Opening night is coming soon and the Dallas Cowboys will be opening up their 2021 campaign in Tampa Bay against Tom Brady and the Buccaneers. There are many storylines to watch for on Thursday night, including just who will be the X-Factor for each team. An X-Factor player can take many forms - a player coming back from injury or an extended absence who needs to show things are fine, a player who flies under-the-radar but can have a big impact, a payer who will have a particularly interesting matchup - basically a player that for the purposes of this particular game could turn the tide.