Dennis Gardeck (born August 9, 1994) is an American football linebacker for the Arizona Cardinals of the National Football League (NFL). He played college football at West Virginia State and Sioux Falls, where he was a nominee for the Harlon Hill Trophy and was a finalist for the Cliff Harris Award. He was signed by the Cardinals as an undrafted free agent in 2018. Gardeck attended Crystal Lake South High School in Crystal Lake, Illinois.