Brian Gerard O'Driscoll is an Irish former professional rugby union player. He played at outside centre for the Irish provincial team Leinster and for Ireland. He captained Ireland from 2003 until 2012, and captained the British & Irish Lions for their 2005 tour of New Zealand. He is regarded by critics as one of the greatest rugby players of all time.

In the game of rugby union, there are 15 players on each team, comprising eight forwards and seven backs. In addition, there may be up to eight replacement players "on the bench", numbered 16–23. Players are not restricted to a single position, although they generally specialise in just one or two that suit their skills and body types. Players that play multiple positions are called "utility players".