Former Clemson WR Mike Williams (LA Chargers) celebrates Tigers' victory over Notre Dame

Mike Williams knows a thing or two about winning a national championship.

The Los Angeles Chargers' second-year receiver helped Clemson capture the 2016 title with a win over Alabama.

On Saturday night, Williams was again celebrating his former team's success as Clemson knocked off Notre Dame to advance to the College Football Playoff Championship ... vs. Alabama ... on Jan. 7.