PITTSFORD, N.Y. (AP) — Jason Day’s golf game is back on an upswing entering the PGA Championship fresh off winning the Byron Nelson last week. The victory was Day’s first in five years and provides the latest hint in how the 35-year-old Australian has finally begun shedding back issues and concerns his career might be over. Day climbed to the top of the world rankings in 2015, when he won the PGA Championship, before a steady decline dropped him to 175th a little over a year ago. He’s climbed back to No. 20 and enjoyed seven top-10 finishes in his past 16 tournaments.