American Football Rules IFAF Approved Ruling 6-4-1:II, III and VIII

III. While a kick is in flight beyond the neutral zone, A1 is standing or running between the ball and B1. (a) The ball strikes A1 while B1 is in a position to catch the ball. (b) B1, in attempting
to catch the ball, bumps into A1. RULING: (a) and (b) Kick-catch interference. Penalty — 15 yards at the spot of the foul. [Cited by 6-4-1-e]

VIII. Fourth and 10 at the 50-yard line. B17 is at Team B’s 20-yard line and in position to catch Team A’s high scrimmage kick. During the downward flight of the ball, A37 contacts B17
viciously and flagrantly before he touches the ball. A37 did not alter his speed or make any attempt to elude B17. RULING: Team A flagrant personal foul, interference with the opportunity to catch a kick. Penalty — 15 yards from the spot of the foul. A37 is disqualified. [Cited by 6-4-1-e]