Jason Day reconnected with his boyhood swing coach Col Swatton last week, and their first order of business was to shore up a putting stroke that used to be a strength for the former World No. 1 but has,

After trading texts and phone calls the last few months, Day and Swatton got down to the high-tech work in a lab working his swing and putting and the results have been immediate.

Shane Lowry rang up six birdies in a 5-under-par 67 to establish a two-shot lead halfway through the Arnold Palmer Invitational on Friday in Orlando, Fla.