Dan Sheehan has been handed a four-game suspension after he was cited for a dangerous clearout on Australia's Tom Lynagh during the Lions' defeat in Sydney last weekend.
The ban will be reduced to three matches if Sheehan takes part in tackle school.
It means Sheehan will miss at least two of Leinster's URC matches at the start of the new season, as well as their pre-season clash with Cardiff.
Advertisement
