An argument of temporary amnesia failed to save St Kilda tagger Stephen Baker from a four-match ban at the AFL tribunal.

While the Saints will accept that suspension, they will consider appealing Aaron Hamill's one-match penalty after he was found guilty of tripping.

In an eventful five-hour tribunal sitting, the temper of Richmond ruckman Greg Stafford became strained under cross-examination.

He was found guilty of engaging in rough play and was banned for three matches, with an appeal unlikely.

Also, Port Adelaide utility Jarrod Schofield, team-mate Matthew Primus and Western Bulldogs ruckman Luke Darcy were all found not-guilty of striking.

The main focus was on Baker's case, which generated plenty of controversy in the last four days.

Baker pleaded guilty to striking Richmond onballer Kane Johnson, but in amazing testimony said he had voluntarily visited a psychologist in the last couple of days over concern at his apparent blackout.

"I've never been that confused in my life," he said, adding he had spoken to the psychologist about his childhood.

The psychologist's report was submitted to the tribunal panel.

But in handing down his sentence, tribunal chairman Brian Collis QC seemed to discount that evidence.

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