Club
In 1968 O'Connor was a key member of the Roscrea senior team that made a long overdue breakthrough and claimed the championship for the very first time. The 2-13 to 3-4 defeat of Thurles Sarsfields gave O'Connor a first winners' medal in the competition.
Roscrea retained the title in 1969, with O'Connor winning a second championship medal following a 4-13 to 0-5 defeat of Carrick Davins. He later collected a Munster medal following a 3-6 to 1-9 defeat of Glen Rovers of Cork.
In 1970 Roscrea secured a third successive championship. The 3-11 to 2-12 defeat of Thurles Sarsfields gave O'Connor a third successive championship medal. Roscrea subsequently retained their provincial crown. The 4-11 to 1-6 defeat of Clarecastle gave O'Connor a second successive Munster medal. On 19 December 1971 Roscrea faced St. Rynagh's of Offaly in the inaugural All-Ireland final. The Tipperary champions held the upper hand and held a 2–4 to 0–1 interval lead. An early goal by Barney Moylan held out prospects of a St. Rynagh's comeback early in the second half, however, a solo-run goal by Joe Tynan produced a goal that put Roscrea back in command and they eventually secured a 4-5 to 2-5 victory. The win gave O'Connor an All-Ireland Senior Club Hurling Championship medal.
Four-in-a-row proved beyond Roscrea, however, the team bounced back in 1972. A 5-8 to 3-6 defeat of Borris-Ileigh gave O'Connor a fourth championship medal.
Roscrea retained the championship title once again in 1973. A 3-14 to 3-8 defeat of Kilruane McDonaghs secured a fifth winners' medal for O'Connor.
After a period of decline, including the loss of two finals, Roscrea reached the decider again in 1980. A narrow 3-11 to 2-13 defeat of Kilruane McDonaghs gave O'Connor his sixth championship medal.
Inter-county
O'Connor first played for Tipperary when he linked up with the minor team in 1966. His tenure in this grade was short-lived as Tipperary exited the provincial championship at the hands of Galway.
In 1967 O'Connor joined the Tipperary under-21 team. He captured a Munster medal that year following a 3-9 to 3-5 defeat of Galway. On 3 September 1967 Tipperary faced Dublin in the All-Ireland final. Pat O'Connor top scored for Tipperary with 1-3 as a narrow 1-8 to 1-7 victory gave Tipperary the title. The win also gave O'Connor an All-Ireland Under-21 Hurling Championship medal.
O'Connor was added to the extended Tipperary senior panel in 1968, however, he didn't make his championship debut until 21 June 1970 in a 2-9 to 0-5 Munster semi-final defeat of Waterford.
In 1971 O'Connor was appointed captain of the Tipperary senior team. A subsequent 4-16 to 3-18 victory over Limerick gave him a Munster medal. On 5 September 1971 Tipperary faced Kilkenny in the All-Ireland final, the first to be broadcast in colour by Telefís Éireann and the only eighty-minute meeting between the two sides. Kilkenny's ever-dependable goalkeeper, Ollie Walsh, had a nightmare of a game in which he conceded five goals, one of which passed through his legs, while Tipperary's Babs Keating played out the closing stages of the game in his bare feet. Tipperary emerged the victors on a score line of 5-17 to 5-14. As well as collecting an All-Ireland medal, O'Connor also had the honour of collecting the Liam MacCarthy Cup. His performances throughout the year also earned him a place on the inaugural All-Stars team.
Tipperary surrendered their Munster and All-Ireland title sin 1972. The team bounced back in 1973 to reach the Munster final again. Limerick were the opponents for the second time in three years, however, on this occasion O'Connor ended up on the losing side. In spite of this defeat he was later presented with a second All-Star.
The next decade saw Tipp go into terminal decline. The county failed to win a single championship match, however, O'Connor did win a National Hurling League medal in 1979. This league victory was followed by a third All-Star award. He retired from inter-county hurling without further success in 1982.[1]