Stephen Curry scored 20 of his 31 points in the fourth quarter and overtime, and his assist on David Lee's go-ahead layup with 32.8 seconds left helped the Golden State Warriors beat the Dallas Mavericks 105-101 Monday night.

Curry had six points and three assists in the extra period. The fourth-year guard fed Lee on his basket that put Golden State up 101-99.

O.J. Mayo scored 27 points, including all 11 of the Mavericks' points in overtime. His eight-footer in the lane tied it at 99 with 41.2 seconds left in overtime.

Lee had 17 points and a season-high 19 rebounds, and rookie Harrison Barnes had 20 points and 12 rebounds for Golden State.

Darren Collison hit a 20-foot jumper with 36.9 seconds remaining to force overtime for Dallas, which has lost five of seven since a 4-1 start.

Curry hit a 14-footer on Golden State's first possession of overtime. He then fed Festus Ezeli for a dunk and found Barnes for a 3-pointer to give the Warriors a 97-90 lead.

Mayo scored the next seven points and his layup tied it at 97 with 1:38 left in overtime.

Curry hit two free throws to give the Warriors a 99-97 advantage with 51.1 seconds remaining.

After Lee's basket, Mayo missed a potential tying jumper. Curry and Draymond Green each hit a pair of free throws to give Golden State just their third win in its last 11 games against Dallas.

Chris Kaman had 18 points and a season-high 17 rebounds for Dallas, and reserve Troy Murphy chipped in 12 points.

Curry scored 14 of Golden State's last 17 points in regulation. He hit a 16-foot jumper off one leg to give Golden State a 90-88 lead with 1:57 left.

Collison hit a 20-foot jumper with the shot clock running down to tie it at 90 with 36.9 seconds remaining.

The Mavericks had a chance to win it after that, but Vince Carter missed a long jumper over Barnes on the last play of regulation.

That capped a nip-and-tuck second half in which neither team led by more than six points.

Lee had 10 points and 12 rebounds in the first half, helping the Warriors take a 43-38 halftime lead. He had a pair of baskets in a 12-2 run in the second quarter that gave Golden State a 35-25 advantage, its largest of the first half.