This article reviews key fantasy football waiver wire pickups for Week 4, featuring noteworthy performances by several players.

Justin Fields, initially thought to be a backup, is stepping up as the Pittsburgh Steelers' QB, demonstrating his potential with a solid game against the Chargers. Players like Ray Davis, Jerry Jeudy, Colby Parkinson, Xavier Legette, and Alexander Mattison have also shown fantasy value, making them suitable additions to rosters.