Seamus Power is two shots off the lead in Texas.
Seamus Power and Padraig Harrington will both hope to build on their bright starts to the Byron Nelson Classic in Texas.
Power is two off the lead following a 7-under par opening round of 65, while Harrington is just a shot worse off.
Americans Jordan Spieth and JJ Spaun share top spot on 9 under.
Paul Dunne tees off his penultimate round at the British Masters at 12.15.
The 2017 winner is 3-under par, and four adrift of leading trio Richard Bland, Robert MacIntyre and Callum Hill.