By Daniel Bates Phil Mickelson has achieved just about everything that a golfer can. However, the 51-year-old has yet to win a U.S. Open. On Monday, the LIV Golf signee found himself back in Boston to compete in the major. And his pairing was revealed thanks to Golf Magazine’s Sean Zak. Per Zak, “Phil Mickelson will be grouped with Louis Oosthuizen and Shane Lowry for the U.S. Open.” Noting, “Other groups [include]: Justin Thomas, Tony Finau, Viktor Hovland – Rory McIlroy, Xander Schauffele, Hideki Matsuyama [and] Brooks Koepka, Cameron Smith, Scottie Scheffler. Mickelson has six times been a …