[CTcard]

I always thought that the "crown" of one's head meant that part which would be covered by a literal crown.  Which would include that portion of the UCLA player's helmet that connected with Owusu.

Here's the NFL rule, Article 8 (g) which separately identifies the "crown" and "hairline" portions of the helmet.  Each are equally illegal:

There shall be no unnecessary roughness. This shall include, but will not be limited to: (g) If a player uses any part of his helmet (including the top/crown and forehead/”hairline” parts) or
facemask to butt, spear, or ram an opponent violently or unnecessarily.

The NCAA rule (quoted earlier in this thread by MT) only specifies hitting with the crown of the helmet as illegal in this situation, and only defines it as the "top portion" of the helmet.

On the other hand, for me these days, the "hairline" part of the helmet and "crown" are pretty much the same thing ... perhaps even by the anatomical definition.

[CTcard]

I always thought that the "crown" of one's head meant that part which would be covered by a literal crown.  Which would include that portion of the UCLA player's helmet that connected with Owusu.

Here's the NFL rule, Article 8 (g) which separately identifies the "crown" and "hairline" portions of the helmet.  Each are equally illegal:

There shall be no unnecessary roughness. This shall include, but will not be limited to: (g) If a player uses any part of his helmet (including the top/crown and forehead/”hairline” parts) or
facemask to butt, spear, or ram an opponent violently or unnecessarily.

The NCAA rule (quoted earlier in this thread by MT) only specifies hitting with the crown of the helmet as illegal in this situation, and only defines it as the "top portion" of the helmet.

On the other hand, for me these days, the "hairline" part of the helmet and "crown" are pretty much the same thing ... perhaps even by the anatomical definition.