Hightower, 29, signed a reserve/future contract with the Saints back in January, as he attempted a comeback in the NFL. However, he was unfortunately released a few days into the 2015 season.
The Saints later brought him back only release him a few days later.
Hightower last appeared in an NFL game during the 2011 season while playing for the Redskins.
Graham, 26, is a former third-round pick of the Bills back in 2012. However, he lasted just two years with the team before Buffalo placed him on waivers and later claimed by the Titans.
Graham caught on with the Jets in September of last year, but was among their final roster cuts. Since then, he’s been on and off of the team’s active roster.
Last year, he appeared in 12 games and caught three passes for 87 yards receiving and one touchdown.