"Feeding off each other can have positive, negative effects for pros"

Jason Sobel takes on the tricky subject of pairings that go well or not so well.

The ESPN.com writer talks to a nice cross section of players and it's fascinating just how influential the momentum of a group plays in pro golf. Rory's comments on the impact of pairings was of most interest, but this was also fun (and not surprising):

Ask most touring professionals and they'll usually insist that there are extremely beneficial playing partners and ... other guys. Which is to say, when players receive their early-week text messages revealing first- and second-round groupings, most will celebrate the positive discoveries, but won't grouse about potentially negative ones.

"I usually play well when I have a fun group, guys who I like," Pat Perez said before the opening round of The Northern Trust. "This week is going to be fun as s---. I've been playing against [Charley] Hoffman since I was 7. [Brian] Harman is cool as s---. We're going to have a great group."