Eldrenkamp, 6-5, 305 pounds, was claimed off waivers by Indianapolis on May 21, 2019 and has spent all 14 weeks of the season on the Colts practice squad. He was originally signed by the Los Angeles Rams as an undrafted free agent on May 2, 2017. Eldrenkamp spent time on the practice squads of the Rams (2017) and Cleveland Browns (2018) before spending a portion of the 2019 offseason with the New England Patriots. As a senior at the University of Washington in 2016, he was a First Team All-Pac 12 selection and was named the Pac-12 Football Scholar Athlete of the Year.