Bostic is the fifth member of the Bears' 2013 draft class to agree to terms on a contract.
A second-round pick out of Florida, Bostic isn't expected to seize a starting job as a rookie, but the expectation is that at some point he'll become the starter in the middle, which is currently manned by veteran D.J. Williams, who was signed in free agency. Bostic possesses the versatility to play all three linebacker positions, and while he's expected to be a reserve in 2013, there's a chance he could earn a place in some of the team's sub packages.
Bostic (6-foot-1, 245 pounds) started 32 of 51 games at middle linebacker at Florida and contributed 237 tackles, eight sacks, 19.5 tackles for lost yardage and five interceptions. Bostic tacked on seven quarterback pressures, two forced fumbles, a recovery and seven pass breakups.
Bostic ran a 4.61-second 40-yard dash at the NFL combine, which ranked as second best among middle linebackers. Bostic also ran a 4.24-second short shuttle at the combine, which serves as an indicator of his agility.
The entire Bears' rookie class will be at Halas Hall from Friday through Sunday for the club's annual rookie mini-camp.
Only first round pick offensive lineman Kyle Long remains unsigned.