Sanchez, 32, threw 18 total passes during his last season in 2016 with the Dallas Cowboys. The former No. 5 overall pick in the 2009 NFL Draft owns a career quarterback rating of 73.9, while completing 56.7 percent of his throws for 15,219 yards, 86 touchdowns and 86 interceptions in 77 career games. Sanchez owns a 37-35 record as a starter.
McCoy, 32, completed 6-of-12 passes for 54 yards and a touchdown in relief of Smith on Sunday. He completed 66.7 percent of his throws for 348 yards, two scores and an interception in three 2018 preseason appearances.
The Redskins face the Dallas Cowboys in an important NFC East clash at 4:30 p.m. on Thursday at AT&T Stadium in Arlington, Texas.