I've mentioned former Bears safety Todd Bell in a previous post regarding Kam. For those who aren't aware of this situation..... Bell was an all pro SS for the Bears in '84 who decided to hold out in '85 for more money. The Bears called his bluff, let him sit, played an unknown named Dave Duerson at SS. Bears win the SB, Duerson becomes an all pro, Bell never regains his starting spot, get traded and is never a pro bowl caliber player again (he ended up playing LB to end his career).
A second Bear, sat out also. Starting LB Al Harris also sat out for the year and Wilbur Marshall took over and also was an all pro player.
Nothing good comes from Kam sitting. Hopefully is he does, we have the same results as the '85 Bears! If the rest of the team stays healthy, they can absorb Kam sitting out if he desires.