Why quarterback K.J. Costello is ready for first Mississippi State start
Mississippi State Bulldogs Preview - Rock M Nation
Transaction: Chargers Sign Quarterback KJ Costello
Mike Leach and K.J. Costello take a migratory pattern to new pass patterns - The Athletic
QB Costello leaving Stanford to join Leach at Mississippi State – The Mercury News
Missouri looks to finish strong against unique Mississippi State offense, Tiger Kickoff
Former captain KJ Costello announces transfer to Miss. State - CardinalSportsReport
2021 NFL Draft: MSU's Costello big-time sleeper at quarterback
Former Stanford QB KJ Costello transferring to Mississippi State - ESPN
FILM STUDY: KJ Costello, grad transfer QB, Mississippi State (Stanford highlights)
K.J. Costello could have a big year at Mississippi State
LSU vs Mississippi State: What To Watch For - And The Valley Shook