LANDOVER, Md. — Washington had lost six straight games. Philadelphia needed to win to avoid the chance of losing the NFC East title with a Dallas victory on Sunday.

The Eagles overcame a 10-point deficit in the fourth quarter, but Redskins rookie cornerback Bashaud Breeland intercepted quarterback Mark Sanchez’s pass with 91 seconds remaining at the Washington 42-yard line. Eight plays later, Kai Forbath kicked a 26-yard field goal with five seconds left that gave the Redskins the 27-24 upset on Saturday.

Leading 17-14, Washington (4-11) faced second-and-14 at its own 32 when DeSean Jackson beat Philadelphia cornerback Bradley Fletcher for a 55-yard catch. Two plays later, the former Eagles receiver drew a pass interference call on safety Nate Allen, setting up fullback Darrel Young’s second 1-yard touchdown run for a 24-14 Redskins lead.

The Eagles, who are 9-6 after losing three straight, responded with an 11-play, 85-yard touchdown drive that ended with Sanchez’s 16-yard scoring slant pass to receiver Riley Cooper, who beat Redskins nickel corner E.J. Biggers.

And when Allen intercepted Redskins quarterback Robert Griffin III’s pass for the double-covered Jackson three plays later, Philadelphia drove 50 yards for Cody Parkey’s tying 22-yard field goal with 6:17 to go.

In another awful season in Washington, Ryan Kerrigan has been a rare bright spot and the outside linebacker came through again on the defense’s first series. Kerrigan’s sack/strip of Sanchez gave the Redskins the ball at the Philadelphia 47.

Griffin completed third-down throws to Jackson and receiver Andre Roberts for first downs before Roberts drew a personal foul on Eagles cornerback Cary Williams on the next third down. The penalty gave Washington a first down on the Philadelphia 8, but they settled for a 25-yard field goal by Forbath with 6:09 left in the first quarter.

Philadelphia followed with a 10-play, 79-yard drive during which their last seven plays gained 18, 7, 7, 10, 8, 5 and 11 yards, the last the touchdown run by running back LeSean McCoy, who tumbled past Washington safety Ryan Clark into the end zone.

Two plays later, Jackson burned Fletcher on a 51-yard bomb. On the next snap, running back Alfred Morris powered 28 yards to the end zone to give the Redskins a 10-7 lead with 19 seconds to go in the quarter.

Philadelphia took over at its 7 with 10:43 remaining in the half and converted a third-and-25 — a 26-yard pass from Sanchez to receiver Jeremy Maclin — and a third-and-16 — an 18-yard pass from Sanchez to reserve running back Darren Sproles — before Cooper beat Washington cornerback David Amerson on a 3-yard slant for the touchdown that made it 14-10.

Roberts fumbled the second half kickoff, but Philadelphia didn’t gain a yard before Parkey was wide right on a 34-yard try after having made 29 of 31 attempts this season.

Given the reprieve, Washington marched 76 yards in 12 plays with a major boost from roughing-the-passer calls on outside linebacker Brandon Graham and defensive end Vinny Curry to regain a 17-14 edge on Young’s 1-yard run 8:14 into the third quarter.

The Eagles then converted two more third downs, but McCoy was stuffed by reserve Redskins defensive end Stephen Bowen on third-and-1 at the Washington 28 and Parkey was wide right again from 46.

NOTES: Eagles QB Mark Sanchez completed 37 of 50 passes for 374 yards. … TE Zach Ertz caught an Eagles-record 15 of them for 115 yards. … The only Redskins with more sacks in a season than LB Ryan Kerrigan’s 13 1/2 are former DEs Dexter Manley and Charles Mann. … Morris joined Stephen Davis (1999-2001) as the only Redskins to gain 1,000 yards in three straight years.