Chargers News: Bolts sign QB K.J. Costello - Bolts From The Blue
K.J. Costello could have a big year at Mississippi State
Mississippi State Football: What makes K.J. Costello the SEC's best quarterback? - For Whom the Cowbell Tolls
Texas A&M rolls past Mississippi State
What K.J. Costello's high school coaches and opponents say about Mississippi State's newest grad transfer quarterback - The Dispatch
Sideline to Sideline: Mississippi State vs UK Football 2020 - A Sea Of Blue
Mississippi State's K.J. Costello back active, but not starting, against Auburn - Sports Illustrated Mississippi State Football, Basketball, Recruiting, and More
Mississippi State true freshman Will Rogers makes college debut
2021 Leaf Draft #12 K.J. Costello Mississippi State Bulldogs XRC Official Pre Draft Football Rookie Card in Raw (NM or Better) Condition : Collectibles & Fine Art
KJ Costello: Mississippi State adds former Stanford QB - Sports Illustrated
Former Stanford QB KJ Costello transferring to Mississippi State - ESPN