Mavericks forward Walt Williams arrived at American Airlines Center on Thursday wearing a John Elway throwback jersey. Elway, the former Denver Broncos quarterback, set an NFL record with 47 career comebacks.

"Wow!" Williams said. "I didn't even know that. I just happened to grab that one."

The shirt almost fit the Mavericks again. But the NBA's Comeback Kids finally ran out of gas, out of luck and out of rallies. The Mavericks blew a 13-point fourth-quarter lead.

The Mavs, who had overcome double-digit deficits in six playoff games, lost to the San Antonio Spurs 90-78 in Game 6 of the Western Conference Finals. A capacity crowd of 20,812, some of whom had paid scalpers as much as $1,000 for a ticket, banged ThunderStix and yelled until the end of the series, won by the Spurs 4-2.