According to Bob Labriola of Steelers.com, the deal is reportedly worth $2.5 million, and it may have come together thanks to ties he has with the Tennessee coaching staff:
Spence provided a statement thanking the Pittsburgh Steelers on Twitter:
A four-year linebacker drafted out of Miami (Florida) by the Steelers in 2012, Spence did not play in his rookie season due to a gruesome knee injury (Warning: Video is graphic in nature) that also kept him out for all of 2013.
Spence has accumulated 63 solo tackles in the last two years he's seen the field but has not had the chance to shine due to Lawrence Timmons and Ryan Shazier establishing themselves as the top linebackers on the Steelers and two of the top linebackers in the league.
But it was clear the Titans needed to address depth at linebacker and that they've seen enough on Spence to believe he's 100 percent recovered and can still be a valuable linebacker in nickel—or even in dime—packages. After spending two years getting healthy, there's plenty of upside to be had for a linebacker at only 25 years old.
Tennessee will return a pair of starting inside linebackers in the form of Wesley Woodyard and Avery Williamson, but with backups Zach Brown and Steven Johnson on the free-agent market, depth was a necessity.
As Labriola mentioned, Spence also has familiarity with the Titans' defensive style since defensive coordinator Dick LeBeau was on Pittsburgh's staff during Spence's first three seasons with the team.
Spence will likely have more opportunities to contribute in Tennessee than he would have in Pittsburgh, and based on LeBeau's long track record of creating defensive stars, he could position himself to land an even more lucrative contract next offseason.