Ramon Sessions added 15 points, Michael Kidd-Gilchrist scored 11 and Bismack Biyombo had 10 points and 17 rebounds for the Bobcats.
Tayshaun Prince scored 21 points to lead Detroit, which snapped a four-game winning streak. Greg Monroe had 18 points, 14 rebounds and six assists and Rodney Stuckey also scored 18 points.
Walker's driving layup with 7.8 seconds left in regulation tied the score at 96-all, sending the game to overtime. Then, he and Tyrus Thomas had four points each for Charlotte in the extra period.
Prince's jump hook with 2:02 left had given the Pistons a 96-94 lead.
NUGGETS 112, LAKERS 105
LOS ANGELES (AP) — Ty Lawson had 21 points and 10 assists, Danilo Gallinari scored 20 points and hit a big 3-pointer with 13.8 seconds left, and Denver won for the fifth time in seven games.
JaVale McGee scored 17 points for the Nuggets, who showed no signs of weariness after a home win over Utah one night earlier. Despite two last-minute 3-pointers by Kobe Bryant, Denver maintained a lead throughout the fourth quarter of its second win in 12 days over the Lakers.
Bryant scored 29 points and Dwight Howard had 14 points and a career high-tying 26 rebounds for the Lakers, who have lost three straight and four of five.
HEAT 99, WIZARDS 71
MIAMI (AP) — LeBron James scored 24 points, Miami had an edge in rebounding and closed with a 21-0 run over the final 7:07 to beat Washington.
The Heat, beaten on the boards by a total of 38 rebounds over the previous three games, this time enjoyed a 50-39 advantage. Udonis Haslem led them with 12 rebounds.
James extended his streaks of scoring at least 20 points to 32 consecutive games this season, and 53 in a row including last year's playoff run.
The Wizards, last in the NBA in points and shooting, hit 36 per cent. They lost their fifth game in a row and fell to 0-13 on the road against Eastern Conference teams.
GRIZZLIES 92, SUNS 81
PHOENIX (AP) — Zach Randolph scored 21 points and Rudy Gay added 20 to lead Memphis.
Tony Allen scored 11 and Marc Gasol had 10 points and 12 rebounds for the Grizzlies, who have won three of their last five games.
P.J. Tucker scored a career-high 17 points and Marcin Gortat added 12 points and rebounds for the Suns. Guards Goran Dragic and Sebastian Telfair combined for just 12 points and seven assists.
Phoenix has lost eight of nine and 15 of 20 dating to November 28.
Despite shooting in the mid-30 per cent range for the bulk of the game, Phoenix trailed 71-65 when Markieff Morris converted a three-point play 31 seconds into the fourth quarter.
But Gasol scored four points, including a fallaway 17-footer, and Gay added a 21-foot jumper to key a 10-3 run that put the Grizzlies ahead 81-68.
THUNDER 104, RAPTORS 92
TORONTO (AP) — Russell Westbrook scored 23 points, Kevin Durant had 22 and Oklahoma City won for the 17th time in its last 20 games.
Serge Ibaka had 19 points and eight rebounds and Kevin Martin scored 16 as the Thunder enjoyed a winning start to a stretch that sees them play 11 of 13 on the road. Oklahoma City came in having played an NBA-low 12 road games this season and improved to 9-4 as visitors.
Nick Collison had 10 points and eight rebounds to help the Thunder win for the fifth time in eight games since their season-high 12-game winning streak.
Alan Anderson scored 17 of his career-high 27 points in the second quarter and Amir Johnson had 19 for the Raptors, who lost their second straight after winning eight of nine.Suggest a correction