Malcom Floyd

The first time Tyrell Williams played this season, he played nine snaps, all on special teams, running down kickoffs and punts in coverage.

This second time, he has the chance to flash his ability on offense.

Wide receiver Malcom Floyd believes in it.

"He's sort of a mirror image of me but younger and fresher," Floyd, 34, said. "He's a speedster. He's out there, running 21 miles per hour. ... I think he's going to be better (than me). He's got a head start. He's healthy. He's durable. We might have the same stats or not, a 40-plus inch vertical, 4.4 speed, but I think there's a tremendous upside with him compared to me. He has a head start. He didn't get hampered by any early injuries or anything like that."

The Chargers are promoting Williams from their practice squad, a source said Saturday morning. He'll be one of four wide receivers active Sunday against the Chiefs; Stevie Johnson, Dontrelle Inman and Javontee Herndon are the others. Herndon and Williams are playing their second career game. They have a 12-yard catch between them.