Does taking the suspension wipe the slate clean? Ie, if he took the fine, got charged for a similar incident, perhaps he would get suspended for more than 3 weeks. If that is the case, taking the medicine in the first 3 rounds might make sense.
There has always been something odd about Matterson though. I remember when he floored Parker and he didn’t look as though he cared. Most players after severely injuring someone show a level of concern / remorse almost immediately.