The Dallas Cowboys have seen their lead in the NFC East shrink and they’re battling COVID-19 issues. The New Orleans Saints are sliding down the NFC wild-card standings and they’re battling a bunch of injuries. The short-handed and struggling teams will meet Thursday night in New Orleans. The Cowboys (7–4), whose 3 1/2-game lead in the division has shrunk to two games after a 1–3 stretch, won’t have head coach Mike McCarthy on the sideline after he tested positive for COVID-19. Defensive coordinator and former Atlanta Falcons head coach Dan Quinn will be the interim head coach, although McCarthy is participating virtually in meetings and game preparations. Right tackle Terence Steele, rookie cornerback Nahshon Wright and five assistant coaches, including offensive line coach Joe Philbin and assistant offensive line coach Jeff Blasko, will miss the game after testing positive for COVID-19. The status of wide receiver Amari Cooper, who is …