The Washington Football Team is dealing with more uncertainty at quarterback as it looks to win its first NFC East division title since 2015.

Coach Ron Rivera said Monday that quarterback Alex Smith was still being evaluated for the injury that forced him out of the second half of Washington’s 23-15 win against the San Francisco 49ers on Sunday.

Smith sustained a leg injury that Rivera described as “calf tightness” after Washington improved to 6-7. X-rays taken at halftime were negative.

In Smith’s place, second-year quarterback Dwayne Haskins completed 7 of 12 pass attempts for 51 yards. Rivera said he would turn to Haskins again against the Seattle Seahawks (9-4) on Sunday if Smith’s unavailable.

“I think Dwayne will be ready, I do,” Rivera said. “If Alex can’t go, then we know that Dwayne will get all the work. And he’ll get an opportunity to focus in and game planning will be directed toward Dwayne, and we’ll see how that goes. So we’ll kind of look at that and go from here.”

Smith has gone 4-1 since taking over as starter in Week 10. Haskins had been benched and backup Kyle Allen had his season ended by a leg injury in Week 9 to open up Smith’s opportunity. In working his way back from a 2018 leg injury, including 17 surgeries to repair his leg and stave off infection, Smith, 36, has completed 146 of 220 passes for 1,420 yards and four touchdowns. He has thrown six interceptions.

Washington started Haskins for the first four games of this season, and he threw for 990 yards with four touchdowns and three interceptions before he was benched in favor of Allen. The team was 1-3 under Haskins.

Washington is in control of its own destiny in the NFC East. The New York Giants are one game back of first place at 5-8, followed by the Philadelphia Eagles at 4-8-1. Washington and the Eagles are scheduled to meet in Week 17 on Jan. 3.