The Offaly golfer is coming off the back of consecutive missed cuts.
World Number One Scottie Scheffler has withdrawn from this Houston Open on the PGA Tour, with his wife expecting their second child.
Another withdrawal has seen Waterford's Séamus Power added to the field, joining Shane Lowry among the pack for tomorrow's opening round in Texas.
Lowry will be hoping to recover some form after missing the cut in his last two outings at the Arnold Palmer Invitational and the Player's Championship.
The Clara man tees off alongside Rickie Fowler and Wyndham Clark just after 20 to 1 Irish time tomorrow afternoon.
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