For week twelve's game, the Bears visited Lincoln Financial Field to play the 9-1 and league-leading Eagles. Although the Bears led the all-time series 30-14-1, they had not defeated the Eagles since 2011, while also losing their most recent game in Philadelphia in 2013 54-11. To take on the Eagles defense, Jeff Joniak elaborated on using a rushing attack that ranked fifth in the league, along with keeping Mitchell Trubisky protected and scoring points; entering the game, the Eagles were allowing less than 19 points per game. Defensively, the Bears faced quarterback Carson Wentz, who led the league in touchdown passes with three, and an offense that ranked first in scoring; eleven different players on the Eagles had scored a touchdown in 2017. With Danny Trevathan and Leonard Floyd out due to injuries, the backups were also challenged by a rushing unit featuring LeGarrette Blount and Jay Ajayi, which ranked second in the NFL. Philadelphia also succeeded in developing high margins of victory, winning by more than 15 points per game, and scoring at least 26 points in every game but their only loss in week two. Despite the stacked odds, as the Bears were able to defeat three perennial playoff teams in Pittsburgh, Baltimore, and Carolina, Joniak wrote the team had to "believe  can happen, and the longer they hang around, the more they will believe." The two teams traded punts to start the game, though the Eagles struck first on Wentz's 17-yard touchdown pass to Zach Ertz. On the first play of the Bears' next drive, Trubisky's pass to Tre McBride was batted and intercepted by Malcolm Jenkins, but Dion Sims stripped the ball away and McBride recovered to continue the series. Four plays later, the Bears punted, but got the ball back after the Eagles' first play of their drive; Blount broke free for a 35-yard run, but Adrian Amos forced a fumble and Sam Acho recovered. Chicago attempted to take advantage of the takeaway, but Cairo Santos' 54-yard field goal went wide right. A drive later, the Bears forced a three-and-out until a holding penalty on Prince Amukamara gave the Eagles a first down. Wentz later escaped a blitz from Cre'Von LeBlanc on third-and-nine to record a 16-yard run, followed by throwing a 15-yard touchdown pass to Nelson Agholor, who escaped Eddie Jackson and Kyle Fuller for the touchdown. Later in the first half, Jake Elliott made a 45-yard field goal to increase the gap, and Wentz threw an eight-yard touchdown pass to Alshon Jeffery with five seconds remaining to make the halftime score 24-0. During Chicago's first drive of the second half, Santos successfully kicked a 38-yard field goal to give the Bears three points, which followed with the defense stopping the Eagles on fourth down, but Philadelphia scored once again in the fourth quarter when Ajayi fumbled in the end zone and Agholor recovered the loose ball. Nick Foles relieved Wentz late in the game and lost a fumble to Isaiah Irving, but Corey Graham intercepted Trubisky's pass for McBride.. How many fumbles did the Eagles lose?