2020 (Defiance): Mueller started all 15 matches he appeared in during the 2020 season. He logged 1350 minutes and scored one goal on August 4, 2020 in a 4-0 over rival Portland Timbers II.
2012 – 2019 (Charleston Battery): Mueller has started 193 of his 212 USL Championship appearances across eight seasons with Charleston, and he has started each of his 124 appearances in the last four seasons. He recorded a career-high 3,000 minutes in 2019, totaling two goals and one assist. In 2017, Mueller was named to the USL Championship All-League Second Team after starting all 33 of his appearances and recording 2,970 minutes. The defender scored a career-high three goals in 26 games during the 2016 season. Mueller has appeared in 14 Lamar Hunt U.S. Open Cup matches, making 14 starts and totaling 1,060 minutes.
A native of Kirkland, Washington and a graduate of Eastlake High School in Sammamish, Mueller attended the University of Washington from 2007-2010. He started 67 of his 72 appearances for the Huskies, recording two goals and 44 shots. Mueller was named to the All Pac-10 Second Team three times, and took home club Defensive MVP honors as a senior in 2010. He was drafted 38th overall in the 2011 MLS Supplemental Draft by the Portland Timbers.