K.J. Costello - Football - Mississippi State
Former Stanford QB KJ Costello transferring to Mississippi State
Former Mississippi State QB getting chance at USFL level - Sports
Mississippi State QB K.J. Costello and Kansas State DB Jahron
Former Stanford QB KJ Costello transferring to Mississippi State
WATCH: Mississippi State's K.J. Costello discusses his record
Former Stanford QB KJ Costello transferring to Mississippi State
MSU QB K.J. Costello wins national player of the week award for
K.J. Costello breaks Mississippi State's single-game passing
Record-Breaking Debut Mississippi State University
K.J. Costello - Football - Mississippi State
K.J. Costello Announces Transfer to Mississippi State from