BOSTON -- The Celtics dont want to rely solely on Isaiah Thomas to win.But on some nights, putting the ball in the All-Star guards hands is simply the best option.Thomas scored 22 of his 30 points in the fourth quarter in Bostons 90-83 victory over the Dallas Mavericks on Wednesday night.He scored 20 of Bostons final 24 points to help the Celtics beat back a late Mavericks surge.Avery Bradley added 18 points and 13 rebounds.After the Mavericks took a 70-66 lead, Thomas scored Bostons next 13 points to put the Celtics back in front 79-76. They never trailed again.After one of the baskets late in the run Thomas ran down the court and flashed two thumbs up.I guess I just like that quarter, Thomas said. Sometimes guys get a little tighter, and then the pressure gets a little tougher for them. I guess I like the pressure.Harrison Barnes led the Mavericks with 28 points. Wesley Matthews added 22.Dallas, which was already missing several players because of injuries, lost two more. Starter Deron Williams exited in the second quarter with a left calf injury, and J.J. Barea was helped off the court in the fourth quarter after straining his left calf as well.Coach Rick Carlisle said it appears Barea will be out for a while, but added that he didnt think it was real serious. He said its his understanding that Williams just experienced some tightness.The Celtics outrebounded Dallas 53-32, which coach Brad Stevens said is a welcomed sign for a team that struggled in that department early in the season.Maybe its the law of averages, and some just bounced our way, Stevens said. But were defending at a better rate than we were.TIP-INSMavericks: Have lost three straight. ... Had a season-low 31 points at the first half. ... Dirk Nowitzki missed his fifth straight game with a right Achilles strain.Celtics: Thomas has scored 20 or more points in each of the first 11 games of the season. ... Scored a season-low 90 points. ...Tied their season high with 19 turnovers. ... Bostons 10-point second quarter was its lowest scoring output in a second quarter this season. ... Al Horford remains in the NBA concussion protocol and sat out his eighth straight game. Jae Crowder missed his seventh consecutive game with a sprained left ankle.TEAM MEETINGCeltics guard Marcus Smart said the team held a meeting after its blowout loss to the Wizards on Nov. 9 to help refocus its commitment on the defensive end.It was no coaches, just us, Smart said. We had to look ourselves in the mirror and come to the conclusion that it is on us and were the ones playing and that we have to get it together.Bradley said the conversation was frank and honest.Just that we need to hold each other accountable, he said. We werent playing to our ability. We had two or three guys playing hard at the defensive end, but the other three guys werent. And we needed everyone playing hard consistently as a team. Tonight I feel like was one our best defensive games.NO FREEBIESThere werent many trips to the free throw line in the first half for either team. The Celtics were just 2 for 6 in the half, and the Mavericks missed their lone attempt in the first quarter. Neither team attempted a free throw in the second quarter.INJURY UPDATEStevens said Crowder would practice Friday, but that he does not expect him to play Saturday against Golden State. Stevens said his last report on Horford was that the big man had a great workout on Wednesday.Carlisle said Dirk Nowitzki is making progress as well.It feel likes hes getting close, he said.UP NEXTMavericks: Return home Friday to host the Grizzlies, before heading back on the road for trips to Orlando and San Antonio.Celtics: Host the Warriors Friday, and then begin a three-game trip with a stop in Detroit on Saturday.---Follow Kyle Hightower on Twitter at http://www.twitter.com/khightower Antonio Freeman Jersey . 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CALGARY, Alberta -- Connor McDavid came through with another big night, and the Edmonton Oilers got another big win.McDavid had a goal and two assists for his second straight three-point game to lead the Oilers to a 5-3 win over the Calgary Flames on Friday night.According to the Elias Sports Bureau,?McDavid became the first NHL teenager and first Oilers player to open the season with consecutive three-point games.We will be talking about him all year and for many years to come, Edmonton coach Todd McLellan said of his 19-year-old captain. You can have a game plan, but he has all the skills and tools, a toolbox that is second to none.Leon Draisaitl had two goals and Jordan Eberle and Mark Letestu also scored to help the Oilers complete a sweep of the teams season-opening home-and-home series. Cam Talbot finished with 32 saves.McDavid showcased his speed in the first period by getting behind the Flames defenders for a breakaway and beating goalie Brian Elliott with a lightning-quick shot.Hes deadly off the rush, Flames defenseman Mark Giordano said. Again tonight, he capitalizes on his chances. He got a few breakaways. Power play, he made some nice plays. Thats another big night for him.McDavid helped set up Eberles tying goal in the second period and Draisaitls go-ahead score early in the third.On Draisaitls tiebreaking power-play goal, McDavid patiently hung onto the puck in the high slot and started a tic-tac-toe sequence with a quick pass down low to Milan Lucic, who zipped the puck across the crease to Draisaitl for a tap-in.I dont really know what to say. Hes just phenomenal. Hes just that good, Draisaitl said. He just makes something happen every single shift out of nothing where you think theres nothing going on and he just creates absolute top, Grade-A chances. Hes very special.Sean Monahan,?Michael Frolik?and Jyrki Jokipakka scored for the Flames, who fell to 0-5-1 in their last six home openers. Elliott stopped 24 shots.Calgary coach Glen Gulutzan said his team needs to tighten up defensively.Were not giving up a ton of chances, were just giving up real high-quality chances, and theres a big difference, said the first-year coach, who took over in the offseason after Bob Hartley was fired.ddddddddddddAbout five minutes after Draisaitls goal, Dennis Widemans turnover led to a short-handed breakaway for Letestu, who beat Elliott to make it 4-2.Jokipakka scored into the top corner off a feed from Kris Versteeg to get Calgary within one with 7:44 to go. However, the Flames couldnt complete the comeback as Draisaitl added an empty-netter with 1:20 left.Elliott, who has given up 10 goals on 55 shots through two games, said he wasnt sure how many odd-man rushes he faced throughout the game.There were a lot, he said. I dont know if there was a count going, but we cant give those up. We have to keep the play in front of us a little bit, especially against a team where we know theyre jumping at any opportunity.Trailing 2-1 after a first period where they were outshot 24-12, Edmonton tied the game 5:25 into the second on the man advantage when Eberle knocked in a loose puck.Calgary started the scoring 1:22 in with Monahan putting in a second rebound after Deryk Engelland hit a goal post and Johnny Gaudreau was stopped.McDavid tied the game on his second breakaway of the period when he tore away from Giordano and zipped a shot over Elliotts shoulder at 7:45.Frolik restored the lead with about 8? minutes left in the first when his shot from the sideboards slipped past Talbot, who didnt appear to see it.Game notes Calgarys 24 shots in the first period were one off the franchise record for shots in a period, done twice before (1988, 2005). ... Calgarys only lineup change came on defense, inserting Jokipakka for Nicklas Grossmann. ... Edmonton made two changes, with Eric Gryba replacing Brandon Davidson on the blue line and Anton Lander coming in for rookie Anton Slepyshev up front. ... The final two games in the season series are both in January.UP NEXTOilers: Host Buffalo on Sunday night.Flames: At Vancouver on Saturday night.Information from The Associated Press and ESPN Stats & Information was used in this report. ' ' '