Packers safety Nick Collins could be out a couple weeks.
That's the estimate made by coach Mike McCarthy today.
Collins injured his left knee while making a tackle midway through the third quarter.
The third-year player went down while tackling Chiefs receiver Samie Parker on Kansas City's first drive of the second half. Parker made a move before hitting Collins head on, sending the safety's body twisting back over his left knee.
Collins had to be helped from the field and was taken away on a cart a few minutes later.