Roughing the Kicker

[ump33]

Play 1. Roughing the Kicker.

Play 2. Legal, This is not roughing.

Case Book Play 9.4.5A is very similar to Play 2 of the OP and the following statement is from the Comment Section of 9.4.5A:
"The rule does not specify that only the player who touches the kick is excused from contacting the kicker/holder, rather it states, “when the defense touches...” (9-4-5b)"

[mbyron]

I would say that the operative language from 9.4.5A is toward the beginning of the COMMENT: "In any situation, if the defense is to be excused for contacting the kicker/ holder as a result of touching the kick, the ball must be touched near the spot of the kick."

[With_Two_Flakes]

...and under NCAA Rules it is even more strict. Only the player who himself blocked the kick is exempt from RTK.

[Robert Goodman]

Originally Posted by With_Two_Flakes

...and under NCAA Rules it is even more strict. Only the player who himself blocked the kick is exempt from RTK.

And under NFL rules it's even less strict -- if the kick is touched behind the neutral zone by B, running into the kicker is off, regardless of when or where the touching occurred relative to the kicker. However, roughing can still be called according to general principles of unnecessary roughness.