/teamtitleist/sea/b/blog/posts/jamie-donaldson-trusts-pro-v1-to-irish-open-victory-leads-4-win-week-for-titleist-players Jamie Donaldson rolled his Titleist Pro V1 golf ball in for four birdies over the final five holes Sunday at the Irish Open to earn his first European Tour victory and lead a four-win week for Titleist players around the world. Donaldson, 36, was theen-USTelligent Community 10