Returning to California, Arnerich began coaching college teams in 2006 and earned a bachelor's degree in 2008.
[6] He played in the Florida Marlins organization before retiring as a player,[2] with the Carolina Mudcats and Greensboro Bats in 2004, and the Jupiter Hammerheads in 2004 and 2005.
[6] Arnerich ended his minor league career with a .231 batting average, 8 home runs, and three stolen bases in 234 games.
[7] Arnerich became an assistant coach in 2006 at Sonoma State University,[2] where he earned a Bachelor of Science degree in Sociology in 2008.
[12] During a COVID-19 pandemic lockdown in spring 2020, Arnerich joined other Mariners players in posting video drills to encourage kids to continue in baseball activity.