Long-snapper Patrick Mannelly will miss the rest of the season with a ruptured ACL he suffered on an extra-point attempt midway through the second quarter.
Mannelly, who joined the Bears in 1998 as a sixth-round draft pick from Duke, has played in a franchise-record 215 games, missing just three contests in 14 seasons.
Fullback Tyler Clutts filled in for Mannelly against the Chargers, snapping on a punt for the first time since high school.
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