[DC 86]

goal keepers head the ball much less and likely have fewer collisions - some, but fewer as fouling the keeper results in a penalty kick.

Are you sure about that?  I think fouling the keeper just results in a free kick at the spot of the foul.  Refs will have a lower threshold for carding the player, but I don't think fouling the keeper on your offensive end results in a penalty kick.

BC

Correct. It can't be a penalty kick because it's not a foul against an offensive player in the offensive penalty area. It's a only a free kick. It is true that goalkeepers are involved in far fewer challenges than outfield players.

[DC 86]

goal keepers head the ball much less and likely have fewer collisions - some, but fewer as fouling the keeper results in a penalty kick.

Are you sure about that?  I think fouling the keeper just results in a free kick at the spot of the foul.  Refs will have a lower threshold for carding the player, but I don't think fouling the keeper on your offensive end results in a penalty kick.

BC

Correct. It can't be a penalty kick because it's not a foul against an offensive player in the offensive penalty area. It's a only a free kick. It is true that goalkeepers are involved in far fewer challenges than outfield players.