They also waived linebacker Tana Patrick on Tuesday.
Edwards has 40 punt returns for 281 yards and 15 kickoff returns for 295 yards over four seasons with Carolina (2010-13) and Cleveland (2013).
Spurlock has appeared in 67 games with two starts over seven seasons with seven teams, including 11 games with Detroit and Dallas last season. He has 81 punt returns for 780 yards and two touchdowns along with 107 kickoff returns for 2,594 yards and three touchdowns.
Hixon has 109 receptions for 1,460 yards and seven touchdowns in eight years with Denver (2006-07), the New York Giants (2008-12) and Carolina (2013).