By Matt Audilet After leading the NFL in total regular-season yards and points last year, Dallas Cowboys offensive coordinator Kellen Moore earned head coaching consideration from around the league. Ultimately, Moore decided to return for another season in Dallas. And now just one game into the year, he’s faced with a unique challenge. Dak Prescott suffered a broken thumb on his throwing hand during the Cowboys’ Week 1 loss to the Tampa Bay Buccaneers. He was forced to undergo surgery and will miss at least the next couple weeks. On Thursday, ESPN NFL analyst Marcus Spears challenged Moore to …