Kilmarnock have lost their appeal against Kirk Broadfoot's red card in Saturday's Scottish Premiership defeat by Aberdeen, but Rory McKenzie's dismissal has been downgraded.
Defender Broadfoot was sent off for lunging at goalkeeper Joe Lewis.
He will now be unavailable until the final game of the campaign after being banned for three matches.
However, McKenzie's violent conduct red card for reacting to a Dominic Ball challenge has been reduced to a yellow.
Stuart Findlay was also dismissed as the Ayrshire side ended the game with eight men.
Manager Steve Clarke described referee Steven McLean's performance as "the worst I've ever seen in my career".
Clarke said McLean cannot handle "the burden" of overseeing matches involving the club that his father, Stuart, represented on more than 500 occasions.