LIV Golf’s Phil Mickelson and Caleb Surratt have dipped into the PGA Tour caddie ranks for not one but two regular caddies, sources tell Golfweek. Mickelson announced on social media that his younger brother, Tim, who had served as his caddie for the past eight years including during the 2021 PGA Championship victory at Kiawah, has retired as his caddie. But he didn’t name a replacement. Golfweek has learned that veteran caddie Jon Yarbrough will be on the bag starting next week at the LIV Golf Miami event and the...