OAKLAND -- It was ugly and it was weird, but the Warriors actually gave themselves a chance Sunday against the Spurs with a wretched but necessary second quarter.

The game's most gruesome 12 minutes were all but forgotten when the Warriors had completed a 97-87 overtime victory that evened their Western Conference semifinal series at two games apiece.

But Golden State scored just 18 points in the second period -- and only two of them came from its starters. The Warriors shot 29 percent in the quarter.

When halftime arrived, they trailed just 45-37. Unsightly as it was, they were still in the game, still in the series.

Coach Mark Jackson had to get creative with his lineup in the second quarter partly because center Andrew Bogut picked up his third foul with 6:19 left in the first and didn't play the remainder of the half.

Likewise, forward Carl Landry played just one minute in the quarter after securing his third foul.

Backcourt starters Steph Curry and Klay Thompson combined to play more than 16 minutes, but tried just one shot between them ... and missed it. Curry, after hitting a couple 3-pointers early in the game, didn't move much on his sprained left ankle in the second.

Rookie Harrison Barnes had the only two points by a Warriors starter in the quarter, making a pair of free throws. The five regulars combined for 0 for 5 from the field.

Reserve guard Jarrett Jack helped pick up the slack with 12 points, and there weren't many more to go around. Festus Ezeli played six minutes for Bogut, but finished the half with four fouls. That prompted Jackson to use veteran Andris Biendrins for the first time since April 12 -- a full month -- and he contributed two rebounds and a turnover in 3 minutes.

Draymond Green played nearly six minutes and Richard Jefferson five in a strange puzzle of second-quarter playing time.

But the Spurs were hardly better, converting just 30 percent in the period, allowing the home team to hang around.