Edinburgh centre Nick De Luca has been suspended for 13 weeks following his red card against Ospreys.
De Luca was sanctioned for a tip tackle on Tom Grabham during the RaboDirect PRO12 match last Friday.
An independent RaboDirect PRO12 disciplinary committee decided the Scotland international's fate, although De Luca has the right to appeal.
De Luca was playing for the second time following his return from surgery on a fractured eye socket suffered in training in January.
A statement from the league read: "Nick De Luca, the Edinburgh centre, appeared today before an independent RaboDirect Pro12 disciplinary committee following the red card issued by the referee for a tip tackle during the Ospreys and Edinburgh match on Friday 22 February.
"Having considered all of the evidence presented, including the video of the incident, the disciplinary committee considered the incident to be at the top end level for this type of offence, and decided that a suspension of 13 weeks was appropriate.
"The suspension concludes at midnight on Sunday 26 May 2013. The player has a right of appeal."