The Cavaliers dropped to 5-11 without Irving in the lineup. The reigning Rookie of the Year is expected to miss three to four weeks — and possibly the rest of the season — with a left shoulder strain.
Dallas guard Chris Wright, who is diagnosed with multiple sclerosis and returned to basketball last July, came into the game with 41 seconds left and scored the Mavericks' final basket. The Mavericks signed Wright to a 10-day contract on Wednesday.
"I just wanted to go in there and contribute something positive, Wright said. "That was pretty cool."
The Mavericks didn't lead until the third quarter.
O.J. Mayo found Collison for a layup and Jae Crowder connected on a 17-footer to finish off the surge and give Dallas a 57-54 lead with 5:06 left in the third.
Collison banked in a 20-footer with 1.3 seconds left in the third. Livingston caught a long pass and hit a turnaround jumper at the buzzer to give the Cavaliers a 68-67 lead.
Crowder had a season-high 14 rebounds and Dirk Nowitzki scored 13 points on 6-of-17 shooting for the Mavericks.
The Cavaliers jumped out to a 13-4 lead six minutes into the game. Dallas missed nine straight shots at one point as Cleveland built its early advantage.
After Cleveland stretched its lead to 11 early in the second quarter, Dallas went on a 16-6 run to get within a point. Beaubois scored six straight for the Mavericks, including a 3-pointer that trimmed the Cavaliers' lead to 33-32.
NOTES: Dallas F Shawn Marion, who missed his fifth straight game Friday night, was diagnosed with a strained left calf after he had an MRI on Friday. Carlisle said the injury was improving, but he did not give a timetable for Marion's return. . Cavaliers G Wayne Ellington didn't play because of a sprained left ankle. ... Cleveland's C.J. Miles is a Dallas native and attended Skyline High School, which is a few miles east of the American Airlines Center. The guard scored eight points and grabbed five rebounds.
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