The Thunder have already done what the two-time champions couldn't against the Mavs – they won a game. OKC beat Dallas Thursday in Game 2 of the Western Conference finals, 106-100.
The backups for the Thunder outplayed the Mavericks' reserves. In Game 1, Dallas' reserves outscored Oklahoma City's 53-22. In Game 2, the Thunder won the battle of the backups 50-29.
"Their reserves came out swinging and really took it to us," said Dirk Nowitzki. "We were never really ready for their reserves."
Like the Eastern Conference finals, the series is essentially starting over as it moves to a new site.
These teams are only going about 200 miles up Interstate 35 for Game 3 on Saturday night.
"It should be fun back at our place," said OKC star forward Kevin Durant.
Barea, for his part, scored 11 points with three assists in 15 minutes. He did not turn the ball over.
Game 3 is Saturday night in Oklahoma City.
Based on reporting by The Associated Press.