2:09pm: The 49ers have officially confirmed the signing of Costanzo, announcing in a press release that they’ve waived guard Al Netter to make room on the roster for the new addition.
9:49am: Free agent linebacker Blake Costanzo has agreed to terms with the 49ers, according to agent David Canter (via Twitter). Costanzo, who spent the last two seasons with the Bears, previously played in San Francisco during the 2011 season.
A seven-year veteran, Costanzo has primarily contributed on kick and punt coverage throughout his career. In 2013, he logged 11 special teams tackles for Chicago and recorded a +6.0 grade for the unit, according to Pro Football Focus’ metrics (subscription required). The 30-year-old played a similar role during his last run with the Niners, racking up 16 special teams tackles while not playing a single snap on defense.
While salary details haven’t yet been reported, I’d expect a minimum salary contract for the special teams ace. It’ll be a one-year contract, per Matt Barrows of the Sacramento Bee (via Twitter).