Seven rounds came and went during the 2019 NFL Draft without any teams selecting David Sills. The West Virginia wideout was a first-team All-American, a first-team All-Big 12 selection, and led the NCAA Division 1 Football Bowl Subdivision in touchdown receptions in 2017. He was selected to the All-Big 12 first team again during the 2018 campaign. Nonetheless, no team took a chance on him throughout the annual event and he thus signed with the Buffalo Bills as an undrafted free agent.
After the Bills waived him in August 2019, Sills ended up on the New York Giants practice squad and was promoted to the active roster in December.