Left tackle Charles Leno knocked on wood Thursday when asked about his durability, and you can’t blame him, considering all the injuries the Bears have had. But Leno’s streak of 2,834 consecutive snaps and 44 consecutive starts since replacing Jermon Bushrod in Week 4 of the 2015 season is looking more and more impressive as the Bears struggle to keep offensive linemen healthy. Right tackle Bobby Massie had a seasonlong streak of 883 snaps snapped when he suffered a knee injury on Jordan Howard’s two-yard touchdown run in the first quarter against the Browns. Leno said he takes pride in being available for his team but isn’t counting his snaps as the streak endures.