LAS VEGAS, July 19 - Marcus Williams hit a go-ahead lay-up with 0.4 seconds on the clock to lift the Memphis Grizzlies to a 76-75 victory over the San Antonio Spurs in the final day of action at the 2009 NBA Summer League presented by EA SPORTS at the COX Pavilion on the campus of the University of Nevada - Las Vegas. Williams totaled 11 points in the contest and his Grizzlies finished the Summer League with a perfect 5-0 record.

Sam Young and DeMarre Carroll paced Memphis with 16 points apiece while Jeff Adrien pulled down a game-high 11 rebounds. Ian Mahinmi led San Antonio with 15 points and nine boards while second-year guard George Hill finished with 12 points in the loss.

An evenly matched game through one the teams knotted in four ties and the lead changed hands 12 times in the first ten minutes of action. Mahinmi led all scorers with eight points in the first quarter, but it was teammate Romel Beck who gave the Spurs a one-point advantage, 24-23, going into the second quarter when he sank last-second lay-up at the buzzer.

Memphis, who outscored the Spurs 21-14 in the second quarter, went up 29-28 on San Antonio in the period and never looked back, extending their lead to as many as seven points, 43-36 before finishing the quarter up six, 44-38. Memphis' DeMarre Carroll scored six points in the quarter, and led all scorers with 10 in the first half.

San Antonio scored 24 points in the third period, holding Memphis to only 13. Beck scored five in the third including another last-second bucket to end the quarter.