Notwithstanding the advice during the week seems a dangerous sling leading to concussion still a yellow in D1R
Instructions are to give a yellow card to get the player off the ground - and it can be reviewed after discussion with fellow umpires and referred to the Umpiring Manager.
People don't always know what the procedures are - but it was upgraded to a Red post game.
Actually think this the right process to follow. We had an incident a couple of years ago where one of our best players received a red card for a dangerous tackle early in the first quarter. He missed the rest of the game and upon review of the video footage, it was thrown out but by then he had almost sat a full week out anyway.
There is still the option for the umpire to call red if they think it warrants it , but yellow by default makes sense.
Correct - if they are certain - then red is appropriate. The League is handling this very well.
Coaches need to educate players to not throw people to the ground.