Bears coach John Fox said Bennett was hurt Thursday, though the Pro Bowl tight end's name did not appear on the injury report.
Bennett is having another productive year, ranking second among tight ends with 28 receptions through five games. He leads the Bears with two touchdown receptions and is second on the club in receiving yards (233). Bennett caught a season-best 11 passes vs. the Oakland Raiders in Week 4.
The 6-foot-6 tight end is known to play through pain. Bennett hasn't missed a game since 2011, when he was a member of the Dallas Cowboys, despite dealing with nagging injuries the past two years in Chicago.
It's an encouraging development for Jeffery, who made it through an entire week of practice without a setback. The former Pro Bowler has been inactive the past four weeks.
"I think we're just trying to progress him along," Fox said of Jeffery. "Time heals. But you'd have to ask him that."
Jeffery said Thursday that his hamstring felt "a lot better than last week."