Tampa Bay (1-3) wiped out an 18-point deficit to go ahead, 22-21, on Connor Barth's third field goal, a 47-yarder with 1 minute, 42 seconds remaining.
But Griffin wasn't finished.
He completed three straight passes to move the Redskins from their own 20 to the 41, then ran for 15 yards to the 26. He completed passes of 15 yards to Santana Moss, 20 to Fred Davis, and 4 to Evan Royster before taking off on his run that got the Redskins into field-goal range. Cundiff kicked the game-winner two plays later.
Pierre Garcon recovered a fumble in the end zone for the Redskins' first touchdown.
Griffin threw for 323 yards without an interception and scored on a 5-yard run.
Redskins 24, Bucs 22
Washington 7 14 0 3 – 24
Tampa Bay 3 3 7 9 – 22
First quarter
TB–FG Barth 50, 4:42.
Was–Garcon fumble recovery in end zone (Cundiff kick), :00.
Second quarter
Was–Griffin III 5 run (Cundiff kick), 7:26.
Was–Morris 39 run (Cundiff kick), 5:15.
TB–FG Barth 57, 1:55.
Third quarter
TB–Jackson 7 pass from Freeman (Barth kick), 1:56.
Fourth quarter
TB–Blount 2 run (pass failed), 9:41.
TB–FG Barth 47, 1:42.
Was–FG Cundiff 41, :03.
A: 58,191.
Was TB
First downs 27 16
Total Net Yards 474 373
Rushes-yards 30-160 18-80
Passing 314 293
Punt Returns 3-17 4-36
Kickoff Returns 2-42 1-2
Interceptions Ret. 1-13 0-0
Comp-Att-Int 26-35-0 24-39-1
Sacked-Yards Lost 2-9 1-6
Punts 6-46.7 6-46.2
Fumbles-Lost 1-0 0-0
Penalties-Yards 8-73 10-107
Time of Possession 32:19 27:41
INDIVIDUAL STATISTICS
Rushing: Washington, Morris 21-113, Griffin III 7-43, Royster 2-4. Tampa Bay, Martin 8-33, Blount 6-17, Ware 1-17, Freeman 2-8, Benn 1-5.
Passing: Washington, Griffin III 26-35-0-323. Tampa Bay, Freeman 24-39-1-299.
Receiving: Washington, Hankerson 7-57, F.Davis 4-70, Morgan 4-62, Moss 3-33, Royster 3-15, Young 2-40, Paul 1-30, Garcon 1-20, Morris 1-(minus 4). Tampa Bay, Jackson 6-100, Williams 4-115, Underwood 3-39, Benn 3-18, Clark 3-15, Martin 2-9, Ware 2-(minus 2), Stocker 1-5.
Missed Field Goals: Washington, Cundiff 41 (WR), 57 (SH), 31 (WL).