Ball carrier is tackled, and goes to the ground and presents, one of his players joins to ruck and is met by the first defender who pulls him towards him, over and to the floor. I'm happy that it would be a penalty to the attacking team but I'm not sure the particular law
Stephen GuestHi Stephen
Technically that 'could' be collapsing the ruck, but that law is a safety issue where a large ruck is collapsed, which is dangerous for any players on the floor beneath it. This law is very rarely used and certainly not in the circumstances you describe.
Personally, The Rugby Ref would do nothing and wait to see what develops. In reality the player who was pulled through would probably roll away and rejoin from his own side, someone else would take his place and the ruck would reform, play would continue.
Remember Stephen, we don't want to blow the whistle if we don't have to. Let's try to keep the game flowing.
The Rugby Ref