London Irish scrum-half Brendan McKibbin has been suspended for three weeks by the Rugby Football Union for stamping on Bath's Henry Thomas.
The 30-year-old Scot was sent off after 20 minutes of the Exiles' 45-14 loss to Bath on Saturday.
Meanwhile, Wasps prop Lorenzo Cittadini has been given a one-week ban after pleading guilty to punching Gloucester back Billy Twelvetrees on Sunday.
Saracens' Jacques Burger has been given a one-week ban for bad sportsmanship.
|More from rugby:|
|Get World Cup alerts direct to your phone|
|Rugby World Cup 2015 fixtures and groups|
|For the latest rugby union news, follow @bbcrugbyunion on Twitter|