“We really want the Rams to succeed in L.A.,” said Angel Fabela, who helps run Rams Empire, a fan group that tailgates near the stadium. But “it’s been a tough first year. There was a lot of buzz, but it’s a little like the air has come out of the balloon.”

Less than 10 miles away, members of the Raider Nation South Los Angeles fan club were lining up in front of the Cork Bar & Grill to watch their team play the Indianapolis Colts in Oakland, nearly 400 miles away. With the Raiders assured of a playoff spot for the first time since the 2002 season, the club members were buoyant.

Floyd Gross, the group’s publicist, snapped pictures and handed out rally towels. Freddy Baker, the sergeant-at-arms, who wore a black T-shirt that read, “Straight Outta Raiders Nation,” hugged some of the other 160 members. Jamal Smith raised the club’s black and silver flag on a pole, while another member unfurled a banner that read: “Bring Back the Los Angeles Raiders. Just Move Baby.” M’anon Thompson, or Tudub to his friends, pulled up on his Harley-Davidson.

“We look like we’re going to the game,” Baker said. “I’ve been thirsting for a year like this.”

It was never going to be easy for the Rams to regain a foothold in Southern California. They have to compete with college football teams at U.S.C. and U.C.L.A., as well as popular out-of-town N.F.L. teams like the Dallas Cowboys and the Green Bay Packers. A host of teams in other sports, including the Dodgers and the Lakers, vie for fans’ attention, and great weather provides plenty of reasons to abandon the sofa and the television remote control.