Rackley said that it was disappointing to miss the 2012 season through injury, but hopes that he can unlock his potential this season with the Ravens.
"It's good be here," Rackley told the club's official website. "I like it here already. "I think I have a lot of untapped potential that hasn't come out with injuries and whatnot.
"Coming in on the lockout year and not having OTAs, stepping into it took me a little while to adjust. The second year, I was looking forward to it because that's usually the year you grow a lot. To miss that entire year, I was really upset about it."
Rackley started 11 games for the Jaguars last season.