The Jaguars need help at receiver because Mike Brown has been ruled out for Sunday's game at Seattle with a back injury. The team also is without starter Justin Blackmon, who is suspended four games for violating the league's substance-abuse policy.
Ebert was on the 53-man roster for last week's game at Oakland and had a 5-yard reception. He was waived the next day and then signed to the practice squad.
He spent the preseason with the Jaguars, finishing with five catches for 46 yards and a touchdown. He was a seventh-round draft pick by New England in 2012 and spent time on the Patriots' practice squad as a rookie.