Tampa Bay's offense sputtered until Freeman connected with Williams on a 65-yard pass that led to the TD pass to Jackson that trimmed Washington's lead to 21-13.
Two more completions to Jackson, this time for 54 and then 22 yards, set up LeGarrette Blount's 2-yard TD that helped the Bucs pull within 21-19.
Griffin began the winning drive from the Washington 20 with 1:42 left. He completed passes of 15 yards to Santana Moss, 20 to Fred Davis and 4 to Evan Royster before taking off on his big run that got the Redskins into field goal range.
NOTES: The Redskins played without safety Brandon Meriweather and receiver Aldrick Robinson, who were declared out after colliding in the end zone during pregame warmups. ... Barth also kicked field goals of 50 and 57 yards, extending his team-record streak of consecutive attempts to 25. ... Freeman was intercepted once and also sacked once.
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