At club level Byrne has enjoyed some success with Kilcormac-Killoughey, winning a county intermediate hurling championship medal in 2006.
Inter-county
Byrne first came to prominence on the inter-county scene as a member of the Offaly senior hurling team. He made his debut in a National Hurling League game against Antrim in 1998. Later that year he made his championship debut against Meath before lining out in his first provincial decider. Kilkenny provided the opposition on that occasion, however, a 3-10 to 1-11 defeat was Byrne's lot on that occasion. This defeat prompted the Offaly manager, Babs Keating, to describe the team as "sheep in a heap", and he promptly resigned. It looked as if Offaly's championship hopes were in disarray, however, they overcame Antrim in the All-Ireland quarter-final and qualified to meetClare in the semi-final. The first game ended in a draw and had to be replayed, however, the replay was ended early because of a time-keeping error by the referee Jimmy Cooney. Following a protest on the pitch of Croke Park by the Offaly supporters it was decided that Clare and Offaly would meet for a third time. Byrne's side won the third game and qualified to play Kilkenny in the final. On that day Brian Whelahan delivered one of his greatest-ever Offaly performances, scoring 1-6. Offaly reversed the Leinster final defeat by winning the All-Ireland final by 2-13 to 1-16. It was Byrne's first All-Ireland medal. He was later honoured with an All-Star award while he was also named Eircell Young Hurler of the Year. Offaly surrendered their All-Ireland crown the following year but returned to the All-Ireland decider again in 2000 in a repeat of the Leinster final. Kilkenny's D.J. Carey capitalised on an Offaly mistake after just six minutes to start a goal-fest for "the Cats". Carey scored 2–4 in all, sharing his second goal with Henry Shefflin who also scored a goal in the second-half. At the full-time whistle Kilkenny were the champions by 5–15 to 1–14. The next two seasons saw Offaly exit the provincial championship at an early stage. Byrne was dropped as first-choice goalkeeper in 2003 and left the panel after the completion of the championship.
Inter-provincial
Byrne also lined out with Leinster in the inter-provincial series of games. In 1998 he won a Railway Cup medal as Leinster defeated Connacht by 0-16 to 2-9.
In 2009 Byrne was appointed manager of the Offaly under-21 hurling team. He enjoyed little success during his two seasons in charge. In 2012 Byrne replacedPaudge Mulhaire on Ollie Baker's Offaly senior hurling management team.
Honours
Team
;Kilcormac-Killoughey
Offaly Intermediate Club Hurling Championship : 2006