49ers LB Fred Warner explains why he switched to No. 54
49ers linebacker Fred Warner isn't happy with the NFL and it's 'finicky rules'
Fred Warner enters NFL Defensive Player of the Year conversation – NBC Sports Bay Area & California
49ers' game review: Fred Warner put hurt on Saints; Christian McCaffrey was hurting
49ers give Fred Warner a five-year, $95 million extension with $40.5 million guaranteed - Niners Nation
49ers news: Fred Warner and Dre Greenlaw were ranked among the league's best linebackers by PFF - Niners Nation
Fred Warner - NFL News, Rumors, & Updates
Fred Warner claims the top spot in AP's NFL linebacker rankings