The Open Champion had put himself in a good position on Friday.
Four over par rounds of 74 on both Saturday and Sunday left Shane Lowry on one over par at the Honda Classic.
The Open Champion was on 7 under heading into the weekend but struggled to back up his form on the first two days.
Australian Matt Jones finished up on 12 under par to claim a five shot win.
"I'm Disappointed We Didn't Finish The Job" - Niall Stack
Tullamore departed the Leinster championship at the semi-final stage on Saturday night.
St Loman's End Championship Bid In One-Point Defeat
The teams were level heading into injury time.
Tipperary Legend Set To Join Offaly Hurling Management Team
He was named Hurler of the Year in 2019.
Portlaoise Panthers Secure Another Super League Basketball Victory
It moves the club up to 5th in the League standings.
Kilcormac Killoughey Through To Final After Midlands Derby Win
An injury time goal sealed the deal for the Offaly Champions.
Panthers Aiming To Extend Perfect Record
Jack Scully's outfit is one of two to hold a perfect record this season.
Razor Thin Margins In KK v Castletown Geoghegan - Gerry Buckley
Both clubs have plenty reason to believe it could be their year.
Tullamore Need "Triple Layered Duvet" Blanket Defence For Cuala Contest
Nigel Dunne looks forward to the Offaly champions meeting with Cuala in Dublin.
Garrycastle Playing For Leinster Final Place
It could be uniquely successful weekend for Westmeath football.
Panthers Hunting For Third Super League Win
The Portlaoise outfit are looking to bounce back from a disappointing loss last time out.
Tommy Fitzgerald Announced As New Laois Hurling Manager
It's expected he'll be ratified officially on Monday.
Offaly's Izuchukwu In Line For Senior International Debut
The former Tullamore RFC man is expected to be named in Andy Farrell's matchday squad.
Kilcormac Braced For "Top Class" Castletown Geoghegan
Shane Hand looks forward to the meeting of the champions of Westmeath and Offaly.
"One Of The Greatest Footballers To Play The Game" - Nigel Dunne Pays Tribute To Brian Fenton
The Offaly footballer reflects on Brian Fenton's retirement from inter-county football.
Two Midlands Clubs Appear On The Podium In Senior Cross Country Championships
The event too place in Fermanagh last weekend.
Ireland Have A Lot To Work On Following Narrow Victory - Henshaw
Ireland played Argentina in Dublin on Friday.
We're Coming Right Just On Time - Paddy Dowdall
The St Loman's manager has watched his side romp to two clear wins in the Leinster championship.
Westmeath And Offaly Fighters Win National Boxing Crowns
Brian Kennedy and Jason Nevin are returning to the midlands as national champions.
Hand "Thrilled" With KK's Leinster Win
The Offaly champions ran five point winners over St Mullin's of Carlow.
St Brigid's Crowned Leinster Champions In Tullamore
The Laois club held on under intense pressure from Naas on Sunday.
