Green broke Ray Allen’s 2008 mark of 22 in a finals series with his fourth 3-pointer of the night early in the third quarter of Game 5. He later added two more and finished with 24 points, shooting 6 of 10 from long range.
It was the fourth time that the once-unheralded swingman has hit at least four 3-pointers this series.
Green is shooting 66 percent from 3-point range this series after breaking the record. He’ll try to add to his total in Game 6 on Tuesday night in Miami.
Allen, who now plays for the Heat, set the previous mark as a member of the Boston Celtics.
The Spurs beat the Heat 114-104 on Sunday.