Midway through the second quarter, Jack was penalized for illegal contact on Chiefs wide receiver Sammy Watkins in the end zone and became visibly frustrated after Watkins stood over him.
After the play ended, Jack shoved Watkins and fellow Kansas City wideout Demarcus Robinson ran over and pushed Jack from behind. The players exchanged words and Jack punched Robinson in his helmet.
Robinson, Jack and Chiefs running back Damien Williams each were penalized for unsportmanlike conduct. Jack became upset again and had to be restrained by teammates after his ejection was announced.
Najee Goode replaced Jack at linebacker. Jack recorded two tackles before his early exit.
Jones drove Foles into the ground after the gunslinger released the ball on a 35-yard touchdown strike to receiver DJ Chark.
The Jaguars announced Foles would not return to the game.