Leeds Rhinos prop Ryan Bailey has been banned for four matches after being charged with two offences in their win over Catalan Dragons on Monday.
Bailey took an early guilty plea on a Grade C offence and was handed an extra two-game ban for a strike on Catalan's Thomas Bosc that saw him sent off.
Castleford's Justin Carney and Hull KR's Travis Burns have been suspended for two games for weekend incidents.
And Huddersfield's Eorl Crabtree was banned for one match.
Carney has now been sidelined twice in a month for ill discipline. He was found guilty of a Grade C dangerous throw during his side's 48-18 defeat at St Helens.
The Australian winger, 24, who joined the Tigers from Sydney Roosters in the winter, recently served a two-match ban after being found guilty of punching during the 52-0 defeat at Hull on 8 March.
Another Australian, Hull KR stand-off Burns, was found guilty of a Grade B high tackle in the Good Friday derby with Hull.
Burns, 29, who missed Monday's club-record 84-6 defeat by Wigan through injury, was forced to sit out the first four rounds of Super League in order to complete a 12-match suspension carried over from his NRL career with Penrith Panthers.
England prop Crabtree, 30, could have faced a two-match ban for a Grade B offence but submitted an early guilty plea.