Rory McIlroy's tied for 14th place after round one at the WGC Bridgestone Invitational in Ohio.
The Open champ carded a 69 and lies on 1 under par, just a stroke behind last year's winner Tiger Woods.
Aussie Mark Leishman shot an excellent 64 in his first round and leads by a stroke.
Ryan Moore, Charl Schwartzel and Justin Rose are all breathing down the leader's neck, tied on 5 under par.
The other Irish representative Graeme McDowell is 1 over.
