McCoy completed 11 of 12 passes for 128 yards and a touchdown in his first meaningful role in a win since Nov. 20, 2011, when he led the Cleveland Browns to a 14-10 victory over the Jacksonville Jaguars.
The Redskins snapped a four-game losing streak to improve to 2-5. The Titans fell to 2-5.
McCoy's first pass was a career-long 70-yard touchdown to Pierre Garcon after the Redskins trailed 10-6 at halftime.
Charlie Whitehurst was 17 for 26 for 160 yards with two touchdowns and one interception for the Titans.
___
AP NFL websites: www.pro32.ap.org and www.twitter.com/AP_NFL
