Ryder Cup MC apologises and steps down over foul-mouthed McIlroy chant

• Heather McMahan led crowd in chant at Bethpage

• PGA of America apologised 20 hours later

The comedian employed to warm up the crowd at the Ryder Cup has apologised and stepped down from her job before the final day's play after she was recorded leading a foul-mouthed Rory McIlroy chant on the first tee on Saturday.

Heather McMahan apologised to McIlroy and Ryder Cup Europe for the remarks. It took the PGA of America 20 hours to address the incident, which happened before dawn on Saturday, which invited questions about whether it was quick enough to act.