However that wasn't before he played a part in the decisive move of the match, scoring the only try in the 22-18 victory over Munster moments before coming off.
And Leinster head coach Matt O'Connor played down the seriousness of the injury that saw the retiring centre replaced; adamant it was a just minor blow to the neck.
"Brian just got a bang on the neck. He was over the ball and he got his neck twisted, but he'll be fine," said O'Connor.
"We understood how important it was to put out a quality performance at home in front of a sell-out at the Aviva. That was enormous motivation for us.
"The four points are huge. It puts us in pole position in the league, which is our bread and butter and it's hugely important to the whole organisation.
"There were a lot of things at play and we came out on the positive side of the ledger on most of them."