It just doesn't make any sense.

On the road, without the starting backcourt, against one of the hottest teams in the East.

It was only fitting that the winning shot in Boston's 113-111 overtime victory come from an unlikely place - Gerald Wallace.

His driving layup with 2.5 seconds to play in overtime would be the difference for the Celtics (15-29) as they ended a three-game losing skid.

Jeff Green was a monster on the floor, tallying 39 points with a career-high eight 3-pointers.

Washington's John Wall had a triple-double of 28 points, 11 rebounds and 10 assists for the Wizards (20-21), who failed to get above .500 for the fifth time this season when the opportunity presented itself.

Phil Pressey, getting the starting nod with Rajon Rondo out because the Celtics didn't want him to play in back-to-back games just yet, had a career-high 20 points, which included a go-ahead 3-pointer with 52.4 seconds to play in overtime.

The Celtics rookie fouled out with 13.9 seconds to play, preventing Marcin Gortat from scoring on an easy layup or dunk.

It was a good foul considering Gortat made just the first of the two free throws which left the score tied at 111.

Boston's Jared Sullinger grabbed the rebound, and the Celtics immediately called a timeout with 9.8 seconds to play which set up Wallace's winning layup.

Making the victory all the more improbable was that it came with their starting backcourt of Avery Bradley (ankle) and Rondo (rest) both out.