Internationally, Yeast worked as an umpire for the 1996 Olympic Games, the 1993 and 1999 Intercontinental Cups, and the 1990 World Championships.
[6][9] He resigned from the NCAA position in order to return to umpiring on the field,[8] where Yeast continued until 2015.
Since 2015 he has served as Coordinator of Baseball Officiating for the Pac-12 and the Big West and Western Athletic Conferences.
In 2022, Yeast was named Supervisor of Football Instant Replay Officials for the Pac-12 Conference.
Yeast was selected to work as the Colloborative Replay Official for the 2021 CFP Semi-Final (Michigan vs Alabama) and National Championship Game (Georgia vs Alabama) and the CFP Semi-Final Game (Michigan vs TCU) in 2022.