Born and raised in Shawnee, KS, Garrelts attended Kansas State University in Manhattan, KS, graduating in 1999 with a Bachelor of Science degree in Business Administration with an emphasis in Accounting. Upon graduation, Garrelts worked for Associated Wholesale Grocers as an Internal Auditor from 2000-2005. In 2005, Garrelts graduated from Park University with a Masters In Business Administration degree and subsequently became the Controller for Valu Merchandisers in Kansas City, MO.
After working in the Kansas City area for several years, Garrelts moved to Tampa, FL in 2010 for a year, working for Citibank, before accepting the Business Manager position with the Norfolk Tides and moving to the area. Garrelts has been working for the Tides ever since. Garrelts was hired as the Admirals' Business Manager in July 2015 and currently performs these duties for both clubs.
Besides the Admirals, Garrelts is a fan of the Kansas State University Wildcats, Kansas City Royals and Kansas City Chiefs.