Muirfield increases total distance for golf 's big - shots at the 2013 British Open . Big changes at the ninth hole include raising the green and adding a bunker . There have also been changes to the greenside bunker to trap balls easier . The Scottish course has lifted its mobile ball barrier for the tournament .
Muirfield increases total yardage for golf 's big-hitters at the 2013 British Open . Big changes at the ninth hole include moving the tee and adding a bunker . There have also been changes to the greenside bunkering to trap balls easier . The Scottish course has lifted its mobile phone ban for the Open .