The Bears defense replaced two starters they had high hopes for Monday.
Three-time Pro Bowl defensive tackle Tommie Harris was a healthy scratch, and cornerback Zackary Bowman was benched in the second quarter.
Bears coach Lovie Smith explained both decisions after his team's 20-17 victory over the Green Bay Packers.
On replacing Bowman with veteran Tim Jennings: "We just felt like we needed to get a different look there; wasn't pleased with the way we started the football game out in that position. Tim Jennings has been practicing hard; we have a lot of confidence in him and just felt like it was time to give him a shot. He played outstanding ball."
On Harris, who was replaced by Matt Toeaina: "We have 45 guys that you can go with; we have everybody healthy right now. Just felt like we wanted to get a look at Marcus Harrison, him and [Henry] Melton inside, a little bit. Just performance based. Tommie's been doing everything we've asked him to do."
Jennings did seem to play well; not only did he have that impressive fumble recovery in the fourth quarter, but he also was sound in his tackling and very aggressive.
But Toeaina wasn't credited with any tackles, and Harrison registered just one.
The Bears, though, have been effusive in their praise of Harris, who has been battling to regain his Pro Bowl form. Although durability hasn't been an issue, Harris managed just one tackle in the first two games and two quarterback hurries.
Despite their 3-0 record, the Bears defense has mustered just two sacks thus far. One of the keys to Smith's defense is the play of the two interior defensive tackles, so they'll need someone to step up in a big way.
As for Bowman, he clearly struggled in the first quarter, as quarterback Aaron Rodgers completed five of six passes for 70 yards, including a seven-yard touchdown.