[1] O'Keeffe played at various times with his local clubs Rathmore in Kerry and Clooney/Quin and St Josephs Doora-Barefield in Clare.
In 1990 he won an All-Ireland Vocational Schools Championship title after a win over Cavan in the final.
Kerry won against Tipperary, Clare and Cork as he added a Munster Minor Football Championship title to his collection.
O'Keeffe and Kerry's campaign came to an end at the semi-final stage after a loss to Tyrone.
Wins over Cork and Clare seen him pick up a Munster Junior Football Championship title.
In the final a masterclass from Maurice Fitzgerald seen Kerry take the title on a 0–13 to 1–07 scoreline and an All-Ireland medal for O'Keeffe.
After an indifferent 1997–98 National Football League O'Keeffee and co qualified for another Munster final after a semi-final win over Cork.
In the final Kerry faced Tipperary and he picked up a third Munster title in a row after a 0–17 to 1–10 win.
In the All-Ireland semi-final Kerry faced surprise Leinster champions Kildare.
Kildare had already seen off two of the last three All-Ireland winners on route to the semi-final and despite being underdogs the Kerrymen fell to a 0–13 to 1–09 loss.
[13] Wins over Tipperary and Clare seen O'Keeffe line out in his fourth Munster final in a row.
In the first year of the back door Kerry faced old fous Dublin in the quarter-final.
Meath ran out easy winners on a 2–14 to 0–05 scoreline, a result that was Kerry's heaviest championship defeat.
On a wet ran in Killarney a low-scoring 0–08 a piece scoreline, with Crowley scoring a point, meant the sides would have to meet again.
In the first championship meeting for the sides since Kildare's surprise 1998 semi-final win, Kerry won on a 2–10 to 1–05 scoreline.
The win meant Kerry were back in Croke Park for a quarter-final tie with All Ireland champions Galway.
The Kingdom ran out comfortable winners on a 2–17 to 1–12 scoreline and were right back in the hunt for another All-Ireland title.
Kerry looked to be in control after he saved a penalty from Oisín McConville and they led at half time, but an early second-half goal saw the Ulster side claim a first All Ireland on a 1–12 to 0–14 scoreline.
Despite a good showing from Limerick it wasn't enough as O'Keeffe picked up his sixth and final Munster title.
Despite winning the game it wasn't the best of days for O'Keeffe as Roscommon scored three goals, the only such time it happened during his career.
[22] O'Keeffe was Clare senior football team goalkeeping coach until the end of the 2022 season.