A day earlier, it was announced that Miller suffered a torn ACL in Sunday’s Week 16 win at Houston that would end his season.
Marshall, who spent the first 16 weeks of the 2013 season on the Broncos practice squad, played five games as a rookie for Jacksonville last season.
A second-year player out of Nevada, Marshall was drafted by the Jaguars in the fifth round (142nd overall) of the 2012 NFL Draft. He totaled 259 tackles with 40 tackles for a loss, six sacks, three interceptions, three forced fumbles and seven fumble recoveries during his career with the Wolf Pack.
Taking Marshall’s spot on the practice squad is wide receiver Nathan Palmer, who spent a portion of the 2013 on the Miami Dolphins practice squad.
Palmer appeared in five games and caught one pass as a rookie with Indianapolis in 2012.