The Baltimore Ravens' latest defeat came Monday night, as the Chiefs rolled to a 34-20 victory with Jackson limited to 97 passing yards and 83 rushing yards.
After the game, Jackson had two words for the Chiefs' dominance.
"Our kryptonite," the Ravens quarterback said, according to ESPN's Jamison Hensley.
While Jackson and the Ravens failed to muster much on offense, Patrick Mahomes accounted for five touchdowns in a battle of the league's two most recent MVPs.
Baltimore managed just a kick-return touchdown and a field goal in the first half. Jackson acknowledged the Ravens have to resolve their issues with slow starts.