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Als' Kyries Hebert admits tackle was illegal, denies he's a dirty player:
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Apparently the Maximum fine is Half a regular seasons game pay:

https://mobile.twitter.com/i/web/status/897529727904239616#tweet_897529727904239616

Alouettes’ Kyries Hebert fined maximum allowable for dangerous hit:

http://3downnation.com/2017/08/15/alouettes-kyries-hebert-fined-maximum-allowable-for-dangerous-hit/

Yes IIRC the maximum fine is 25% of a week's pay. Since he's a repeat offender he really should be suspended.

Yeah no idea how the refs missed that one, it was pretty blatant.

Johnson was fined for that hit:

https://www.cfl.ca/2017/07/20/ball-messam-goosen-among-fined-week-4/

Given how little discipline the league actually hands out I wouldn't be that surprised if the players actually took it upon themselves to handle it.

Kyries Hebert doles out yet another dirty hit:

http://3downnation.com/2017/08/11/kyries-hebert-doles-yet-another-dirty-hit/