What is going on with the Athletes lately?

To be passed-out for 15 minutes? This is not normal. Does it even have to be explained?

Source: 7News.com.au
https://7news.com.au/sport/afl/fit-dees-back-on-track-for-afl-flag-push-c-4826922

Jake Lever was assessed for 15 minutes before being allowed to leave the field.