Tennessee Titans quarterback Marcus Mariota suffered a stinger in the second quarter of his team's 25-16 win over the Washington Redskins on Saturday and did not return.
Mariota suffered the injury following a Jonathan Allen sack with 55 seconds left in the first half.
The fourth-year pro has suffered multiple injuries in 2018. He battled an ulnar nerve issue in his right throwing elbow in Week 1 that forced him to miss a 20-17 victory over the Houston Texans in Week 2. Mariota returned in Week 3 but then left a November 18 game against the Indianapolis Colts early after suffering another stinger.