Clara's Open Champion shot an impressive round of 68 yesterday.
Shane Lowry is three shots off the lead heading into day two at the Masters.
An opening round of four-under-par 68 sees the Offaly man lie in a tie for sixth at Augusta.
Viktor Hovland, Brooks Koepka and Jon Rahm share the lead on seven-under-par.
Rory McIlroy is level par after a 72.
McIlroy admits he struggled at times during his first round.
Seamus Power is one-over, with Belfast amateur Matthew McClean on five-over-par.
Our coverage of this year's Masters is with thanks to Keenan Bauer Motors Mullingar
Your home for Citrion and Honda in the Midlands - Keenanbauer.com
And Total Tile Centre Mullingar, Quality First Service always, talk to our experienced staff to discuss you tiling needs.