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/khightowerJoe Thomas Jersey . 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Baker Mayfield Jersey . -- Ty Montgomery had 290 all-purpose yards and two touchdowns, and fifth-ranked Stanford held on to beat No.BOSTON -- Mark Trumbo gave the Baltimore Orioles another mighty home run, and Kevin Gausman took it from there.Trumbo hit his major league-leading 42nd home run, Gausman outpitched Rick Porcello over eight innings and the Orioles pulled within a game of AL East-leading Boston with a 1-0 win over the Red Sox on Wednesday night.Baltimore took two of three in the series at Fenway Park and pulled a game ahead of slumping Toronto for the top AL wild card. The Blue Jays lost at home to Tampa Bay 8-1 earlier Wednesday.The guys have earned the right to play these type of games. Its a very quiet confidence, Os manager Buck Showalter said. Theyre not guys that toot their own horn. I think they kind of like when people sell them short.Gausman (8-10) and Porcello (20-4) both pitched gems and had nearly identical line scores over eight innings, except Porcello threw a hanging slider that Trumbo drove over the Green Monster on the first pitch of the second inning.It was a bad pitch and he jumped all over it, said Porcello, who lost a home start for the first time this season.Trumbos at-bat in the second was about the only time a hitter prevailed against either starter. Each finished with six strikeouts and limited a powerful offense to four hits before giving way to the bullpen in the ninth.This was a classic pitchers duel, Boston manager John Farrell said. In the second inning, you dont think theres only going to be one run on the board for both clubs combined but tip your hat to both guys.Zach Britton closed for his 43rd save.Porcello was 13-0 in home starts with one no decision entering the game. Trumbo belted the first pitch of the second inning out to left, easily clearing the Monster for his career-high 100th RBI. The one run ended up deciding the series, with another to follow next week when the Orioles host the Red Sox for four games.Were just out there competing. You dont really take into account whos done what where, Trumbo said. Whether it be at this park or another one, we still have a job to do.Meanwhile, the Yankees are hanging around behind the Os and Blue Jays in fourth place. New York comes to Boston for a four-game series trailing the Red Sox by four games.We dont anticipate anything different from here all the way out, Farrell said. This is going to be a hard-fought division right to the final game of the season. We fully embrace it. We fully exxpect it and were looking forward to the challenges ahead.ddddddddddddGREAT GAUSMANThis was Gausmans fourth scoreless outing in his past five starts and matched the longest start of his career. He threw 120 pitches and lowered his ERA to 3.43.I think Im just being a lot more consistent with all my pitches, Gausman said. Every year Ive always got better as the years gone on, but this year its kind of all clicking for me.POWERED UPBaltimore homered three times Tuesday in a 6-3 win to even the series, then clinched its fourth straight series victory with another homer by Trumbo.Hes figured some things out. Hes not as susceptible to offspeed pitches as he once was, Farrell said. Hes got as much power as anybody in the game and if you dont make your pitches, you see what he can do with it.OUCHBoston had a scare in the second when J.J. Hardy hit a hard grounder up the middle and the ball bounced off Porcellos calf to third baseman Travis Shaw. Hardy ran out the single while Porcello limped around the mound, and the game was delayed briefly to allow Porcello a few warm-ups before continuing.It got me in a good spot. If it got me in the shin it might have been a little bit tougher, Porcello said.TRAINERS ROOMOrioles: OF Steve Pearce was in New York on Wednesday to receive a platelet-rich plasma injection the Orioles hope will speed his recovery from a sore right elbow. Well let it run its course and see if hes going to be available to us at some point, Showalter said.Red Sox: RHP Steven Wright (right shoulder strain) is expected to start throwing next week in Fort Myers, Florida. Farrell said the knuckleballer will need to gradually regain some arm strength and his return during the regular season is uncertain. I dont want to rule it out, but at this point its going to become a little bit more challenging with each passing day, Farrell said.UP NEXTOrioles: RHP Yovani Gallardo (5-7, 5.44 ERA) starts as the Orioles are back at home for a four-game series against last-place Tampa Bay. LHP Blake Snell (5-8, 3.62) starts for the Rays.Red Sox: LHP Eduardo Rodriguez (2-7, 4.70) gets the start Thursday as Boston opens a four-game series against the New York Yankees. RHP Masahiro Tanaka York Yankees. RHP Masahiro Tanaka (13-4, 3.04) is