Barry Ryan is a wizard and a member of the Irish National Quidditch Team that won the 1994 Quidditch World Cup. His specific position is not stated in the novels, but he is part of the celebrated team that faced the Bulgarian National Quidditch Team in the tournament final.
Barry Ryan's only appearance in the original book series is during the 422nd Quidditch World Cup in 1994. He is announced by Ludo Bagman as part of the starting lineup for the Irish National Quidditch Team just before the final match begins. While his specific contributions to the game are not detailed in the play-by-play commentary within the novel, he was on the pitch for the entirety of the historic match. Ireland ultimately won the cup with a score of 170 to 160, despite the Bulgarian Seeker, Viktor Krum, catching the Golden Snitch. As a member of the winning team, Barry Ryan is a Quidditch World Cup champion.
The novels provide no description of Barry Ryan's physical appearance or his personality.