Spieth Back to Defend Title That Set Up Landmark Season

(Reuters) - Twelve months ago, Jordan Spieth learned the art of closing the deal when contending for a golf title and the floodgates have certainly opened for the young American since that lesson.

Dominant victories in successive weeks at the Australian Open and then the Hero World Challenge in Florida at the end of last year paved the way for a landmark 2015 PGA Tour campaign that yielded five wins, including two at the majors.

While Spieth knows it will be challenging for him to build on that success next season, the world number one was in an upbeat mood on Wednesday as he prepared to defend his Hero title this week in the Bahamas.

"This is a very easy week for us," a smiling Spieth told…