Reckless from The Tullow Tank but he is free to play the final two games of the season.
Guinness PRO12 officials have confirmed that Leinster flanker Sean O'Brien will not be cited for this offence, which earned him a yellow card against Ulster.
O'Brien was sent to the sin-bin, midway through the first half, for his tossing of Iain Henderson, the Ulster forward.
Referee John Lacey decided that a simple caution was required and league officials have backed him up. O'Brien, then, is free to face Treviso and Edinburgh in Leinster's final two games of the season.
Clip via:
Le-Rugbynistere
