(Reuters) - With his best man duties now out of the way, Zach Johnson is delighted to be back in PGA Tour action for this week's Deutsche Bank Championship after missing the first event of the lucrative FedExCup playoffs. Johnson was a notable absentee from The Barclays last week in New Jersey, having made a long-standing promise to support his brother, Gabe, at his wedding. Though the wedding date clashed with one of the biggest PGA Tour events of the year, Johnson was more than happy to fulfill his family obligation. "It's my brother. ... More...