Zane and Karsten were on the field waiting for WSU baseball player, Justin Harrer, to finish an interview so they could get their foul balls signed. Harrer is the one who hit the walk off home run to beat ASU in the 10th inning.
The boys appear on the right side of the screen at about the 1:22 minute mark into the video.
https://pac-12.com/videos/washington-state-baseballs-justin-harrer-his-walk-home-run-against-asu-i-think-i-knew-when-it