The Giants announced the move Monday. New York waived Brad Wing after last season.
Dixon was the Broncos' seventh-round pick in 2016. He averaged 45.7 yards in his two seasons with a net of 40.8 yards.
First-year pro Austin Rehkow is also on the Giants' roster.
New York also waived second-year wide receiver Darius Powe. He made his NFL debut against Dallas on Dec. 10 when he started at wide receiver and had two catches for 13 yards.