Pac-12 Networks' Ashley Adamson catches up with Stanford quarterback K.J. Costello to discuss the upcoming season, offensive changes and personal improvements in the offseason. Costello finished the 2017-18 season with the second-most passing yards in Cardinal history with 3,540 and was named the 2018 All-Pac-12 Second Team. In the final four games of the season Costello finished with 10 touchdowns and two interceptions.