“It's really weird actually. It's a bit strange,” Casey said on Friday at the Deutsche Bank Championship.
Casey didn’t take up European Tour membership this season, a decision that cost him a spot on the European Ryder Cup team, on which he has played three times.
“It's going to be an interesting one, sitting, being on the outside. I've been on the outside before but for different reasons,” said Casey, who held a share of the early lead at TPC Boston after an opening 66.
Casey said he will miss being on the team next month at Hazeltine National, but most of all he said it’s been strange the last few weeks not having that motivation to play well to make the team.
“Not being a factor, not being part of whether I make the team or not this time around, you lose that churning in the stomach,” he said. “I'll tell you right now, you wake up in the morning and you're in but not solid or you're just on the outside trying to make it or you've got no chance but you might be a pick, whatever the scenario, there's always a little churning in the stomach.”