After Rory McIlroy’s Masters win last Sunday , the Northern Irishman was asked in his winner’s press conference if he had been watching the leaderboard during the final round.  The answer was yes, but not necessarily in the way you’d think. “I was out there today looking at [Shane Lowry’s] score because I was interested to see, if I didn't win today, I wish I would have been putting the Green Jacket on him,” McIlroy said.  Lowry, however, shot a final-round 80 and finished T37, despite starting the day two strokes back of the lead.  And even though McIlroy and Lowry are close friends, the Irishman, after a brutal day on the course, couldn’t bring himself to celebrate McIlroy’s victory on Sunday night.  “I texted him Sunday night, and I said, ‘Honestly, I’m so happy for you, but I don’t have it in me tonight to come over and celebrate with you,’” Lowry told Golf Channel Thursday at the RBC Heritage.  “I was feeling a bit down and dejected, so I just sat at home with my crew.…