British Open runner-up Horschel pulls out of 3M Open

"Yeah, it was unfortunate," the world No. 33 said. "I wasn't feeling great late last night and took some medicine.

"Had decent sleep but woke up and just have a fever, body is just not wanting to respond, every muscle feels like it's locked up. Tried to do a little warm-up in the gym, just didn't respond.

"Tried to go out to the golf course and hit some balls, body's just not wanting to cooperate.

"(It's) disappointing. I was looking forward to playing here at 3M. Played here last year, had a good finish. The event is well run so very disappointed not to be able to play here after coming off a really great finish last week."

Horschel was replaced in the field by first reserve Adam Long.