Analyzing high-impact 2020 NCAA transfers for the 2021 NFL Draft
Why quarterback K.J. Costello is ready for first Mississippi State start
College football graduate transfers making immediate impacts – The Denver Post
Former) Stanford in the NCAA: Costello breaks SEC passing record
Stanford transfer QB K.J. Costello chooses Mississippi State and Mike Leach over Washington, Sports
Transfer Tracker: Ranking QB transfers for 2019-2020 cycle - Rivals.com
Mississippi State Football: 3 reasons KJ Costello will excel with Bulldogs - Page 3
KJ Costello Quarterback Mississippi State
Leach after loss: We'll 'see who really wants to play' at Mississippi State
KJ Costello: Mississippi State adds former Stanford QB - Sports Illustrated
Former Stanford QB KJ Costello transferring to Mississippi State - ESPN
Analysis: Why Washington should pursue USC transfer QB J.T. Daniels
Reports: Stanford QB K.J. Costello in transfer portal