[1] Prior to the 1995 season, Walker was named head coach for the Oregon State Beavers softball team.
In 1999, he led the Beavers to a 47–25 record, setting a program-record for the most wins, and advanced to NCAA Tournament for the first time in program history.
[2] In 2005 he led the Beavers to a 43–16 record, and their first-ever conference championship in program history and an automatic berth to the NCAA Tournament.
[3] Walker served as the head coach at Oregon State for eighteen years, where he posted a 594–490–3 record, and eight seasons with at least 40 wins.
[6] On November 18, 2019, Walker was named head coach and assistant general manager for the California Commotion of National Pro Fastpitch.