The rub of the green, which can account for various fluctuating fortunes and the good and bad that happens during a round, is par for the course in this fickle old pursuit of inherent imperfections.

Maguire is the lone Irish player in Mexico while Séamus Power – also aiming to bounce back from a missed cut in the PGA at Quail Hollow – is also the only Irish player competing in the Charles Schwab ...