ORLANDO, Fla. — Since opening the year with an eight-shot win in Maui, Jordan Spieth has tied for 21st, missed a cut, tied for 17th and tied for 18th on the PGA Tour.

Hardly results of concern, but when you’re the No. 1 player in the world and coming off a season in which you won two majors, expectations are heightened.

So are the demands.

In the past few months Spieth’s itinerary has included trips to China, Australia, the Bahamas, Hawaii and Abu Dhabi. He has also crisscrossed the U.S. for a handful of tournaments.

“I’m worried about him because I don’t know if he’s playing too much and he’s doing too many things with golf and sponsor obligations that he might make — may get burned out and go through a rut where he doesn’t want to be on the golf course for awhile,” Jason Day said Tuesday from the Arnold Palmer Invitational presented by MasterCard. “Everyone goes through that.”

Day can speak from experience. He won five times last year, including his first major at the PGA Championship, and briefly got to No. 1 in the world.

But his wife gave birth to the couple’s second child in November, and he took three months off — not that his results have been any better with just one top 10 in four starts.

“I’ve told a few people on my team I’m kind of worried about him because of what he’s kind of putting himself under,” Day said of Spieth. “He has played a lot of golf, especially the last few years.”

At least Spieth will get some rest this week. He’s not in the field at Bay Hill.