Brittney Griner had 21 points and 10 rebounds, and the Phoenix Mercury set a WNBA record for points in a quarter with 45 in the first before holding off the short-handed Connecticut Sun down the stretch for a 90-84 win on Thursday night. Phoenix broke the record of 44 points in a quarter set earlier this season by New York to build a 21-point lead. But the Mercury only scored seven points in the second to have their lead trimmed to 52-48 at the break. The 38-point difference was the largest drop-off in points from one quarter to the next in WNBA history.