George leaped to contest a fast-break layup by James Harden with 9:33 left in the fourth quarter and his leg smashed against the bottom of the backboard stanchion.
After roughly 10 minutes of stoppage, George was taken out of the arena on a stretcher. Coach Mike Krzyzewski then announced to the crowd that the scrimmage would not be finished.
The White team led George's Blue team 81-71.
George was considered a lock to make the final 12-man roster for the World Cup of Basketball that starts later this month in Spain.
AKRON, Ohio (AP) - Sergio Garcia doesn't know anything about being in a zone. He had no trouble identifying the best round of his career.
Garcia one-putted the final 11 holes and made birdies on his last seven holes Friday in the Bridgestone Invitational to tie the course record at Firestone with a 9-under 61 and take a three-shot lead.
He had a birdie putt on every hole on the back nine, missing only a 15-footer from the fringe at No. 11. Garcia shot 27 on the back nine, a course record.
''Just one of those moments that you love and you enjoy, and you wish there were no end,'' he said.
It matched the tournament record held by Tiger Woods, who shot 61 in 2000 and 2013, and Jose Maria Olazabal, who shot his 61 in 1990. Woods went on to win by 11 shots in 2000 and seven shots last year. Olazabal won by 12 in the World Series of Golf.
Garcia was at 11-under 129, three shots clear of Justin Rose (67). British Open champion Rory McIlroy birdied his last two holes for a 64 and joined Marc Leishman (67) four shots out of the lead.
Garcia's previous best score was a 62 on three other occasions - as a 19-year-old at the Scottish Open and Byron Nelson Classic in 1999, and at Mount Juliet in 2002 at the American Express Championship.
Woods also shot his 61s at Firestone in the second round. He could have used something remotely close to that to stay in range of Garcia. Instead, Woods hit only four fairways off the tee and couldn't seem to make anything on the green. It added to a 71, leaving him 10 shots behind.
BLAINE, Minn. (AP) - Tuesday qualifier Marco Dawson shot a 9-under 63 to take the lead in the Champions Tour's 3M Championship, leaving Bernhard Langer a stroke back five days after the German star's record-breaking victory in the Senior British Open.
Dawson, playing the back nine first at TPC Twin Cities, birdied three of his first four holes and chipped in for eagle on No. 18. After a birdie on the par-5 third hole, he birdied three of his final four holes.
Langer, the two-time 3M champion who won by a tour-record 13 strokes Sunday at Royal Porthcawl, was tied for second with Jeff Maggert, Rocco Mediate and Vijay Singh. Langer holed out from 155 yards for an eagle on the par-4 14th and added birdies on Nos. 16 and 18.
Kenny Perry opened with a 65, and Paul Goydos had a 67 in his debut on the 50-and-over tour.
STANFORD, Calif. (AP) - Serena Williams roared back after falling behind in the third set to beat Ana Ivanovic 2-6, 6-3, 7-5 on Friday night to reach the semifinals of the Bank of the West Classic.
The top-seeded and top-ranked Williams dropped three consecutive games to fall behind 4-3 and then ripped seven straight points to right the ship in front of a sellout crowd at Stanford.
Williams assured herself of a 200th non-consecutive week at the top of the ladder while Ivanovic will return to the top 10 for first time in over five years.
Andrea Petkovic ended Venus Williams' run in the tournament, beating the former top-ranked player 6-1, 3-6, 7-5 in the quarterfinals.
She gets a shot at Serena Williams on Saturday afternoon.