Phil Simms pointed out that Knox was leaning which could have caused him to lose his footing. I'm not a wide receivers coach so I'm not going to dissect Knox's technique. Did Knox slip because he was leaning? Maybe.
I do know the Soldier Field turf does not have the reputation as being one of the playing surfaces in the NFL. I also know that it's not the first time Bears receivers or the secondary have slipped on this surface.
I've made a big stink about Soldier Field's sod in the past and the field looks to be in great shape but I don't trust it. If the field was indeed not in it's best condition, the Bears will need to make the switch to Field Turf. Losing Cutler for the regular season is a huge blow to the team's investment in him and in the franchise.
I know meatheads will say "playing on Field Turf is not Bears football". Were the 85 Bears not playing "Bears football" because they played on AstroTurf? Sorry, but that's not an argument for not wanting to play on Field Turf.
In reality, the playing surface probably did not play a role in Knox slipping that led to the interception, that led to Cutler's injury. I'm just as shocked as everyone and I'm just looking for something to blame.