Former English international turned Sky Sports Pundit has dubbed Seán O'Brien as a "really interesting contender" in the Lions squad.
With captain Sam Warburton not named in the side to face the Crusaders on Saturday evening, the Leinster flanker O'Brien has the chance to impress.
It has been a poor start to the tour of New Zealand after a slender victory in the opening game against the NZ Provincial Barbarians, and then a loss to The Blues in Auckland on Wednesday, but Barnes believes O'Brien could claim a place in the starting fifteen due to his ball carrying.
Alan Quinlan opts for Peter O'Mahony however, stating that his "line-out expertise" would give him the edge for the nod to start in the next match and possibly in the first test match against the All-Blacks on June 24th.
The team in full for the Crusaders clash on Saturday is below. Kickoff is 8:35 Irish time.