Bristol Bears lock Josh Caulfield has been banned for four weeks after European Professional Club Rugby (EPCR) successfully appealed against a decision to overturn his red card.
Caulfield was sent off against Connacht in the Champions Cup on 19 January for stamping on prop Finlay Bealham.
A independent disciplinary committee then decided the offence did not warrant a red card.
But EPCR, which runs European club rugby competitions, contested that.
The Bears were knocked out of Europe after defeat by Connacht and sit eighth in the Premiership.