Lewis said that Boling would have surgery.
Cincinnati was forced to move left offensive tackle Andrew Whitworth to the inside following the first-quarter injury to Boling.
Much like the Bengals did when Boling went down briefly in a game at Cleveland this season, they made up for his absence Sunday by sliding Whitworth over and moving Anthony Collins into Whitworth's tackle slot. Right tackle Andre Smith, who had been benched in favor of Collins for an unspecified reason, came into the game after the injury and played his normal position.
With Boling out, the large and athletic Whitworth was forced into pulling and serving as a lead blocker for BenJarvus Green-Ellis, who had his best game of the season with 92 yards and a touchdown.
"With him pulling, it was just like an old-school game," Green-Ellis said. "When he pulls, you can't even seen the linebacker. So you just kind of pick your poison with where you go."
Lewis wouldn't commit Monday to Whitworth remaining at the left guard spot but said it's an option. The coach said he expects right guard Kevin Zeitler to return from a two-game absence due to a foot injury.
ESPN.com Bengals reporter Coley Harvey and information from The Associated Press was used in this report.