Byron Schammer's recent reprimand could now cost the Fremantle midfielder a one-week AFL suspension.

The match review panel has charged Schammer with striking Carlton onballer Marc Murphy during Saturday's night win on the Gold Coast.

Schammer took an early plea on his charge of front-on contact after round four, meaning he was able to keep playing.

But he was also left with 70.31 carryover points.

Even if Schammer accepts his one-match ban for striking Murphy, the carryover points mean the penalty will stand.

He is out for one match, regardless of what happens, making it more likely the Dockers will take the case to the tribunal.

The match review panel classed this latest charge as a level-two striking offence, meaning 125 demerit points.

Even if he accepts his penalty, the addition of the carryover points to 146.48 points - well above the 100-point threshold for a one-game ban.

North Melbourne small forward Lindsay Thomas can accept a reprimand for striking Port Adelaide onballer Steven Salopek.

The classification of the offence meant 80 points and Thomas can reduce that to 60 with an early plea.

It is a quiet tribunal week, with Geelong ruckman Shane Mumford also fined for negligent umpire contact.

The latest player to fall foul of the league's crackdown this season on umpire contact was fined $2600, or $1950 if he takes the early plea.

The match review panel overturned a match-day report against North Melbourne veteran Adam Simpson for rough conduct against Port Adelaide midfielder Kane Cornes.

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