Jason Day and Jordan Spieth wield new swings and the worries that come with them

AUGUSTA, GA. – Golf is easy, especially for major winners. Just sort through the 2 million swing thoughts swirling through your head, and pick one, or one thousand. If you struggle, hire a new swing instructor. The one who emphasizes swing plane, or the one who wants your weight to stay on your left foot, or the one who wants you to springboard off the ground, or the one who wants you to “feel” the clubhead. Jason Day vaulted to No. 1 in the world golf rankings in September 2015, a month after he won the PGA Championship at Whistling…