It's the final tournament before the masters next week.
Shane Lowry will resume five shots off on course leader Sam Burns at the Houston Open this evening.
The Clara man gets his second round underway at 5 to 6 in a tie for 16th at one under par.
Padraig Harrington goes out from 1-over just under an hour later.
Graeme McDowell’s dropped back to level par, seven holes into his second round.