SPRINGFIELD -- Jimmy Walker appears headed to victory Sunday in the PGA Championship at Baltusrol Golf Club.
Although he has five wins on the PGA Tour, three on the Web.com Tour and has starred in the Ryder Cup for the United States, the 37-year-old Oklahoman isn't well-known.
Here are five things you should know:
Walker had been struggling.
He tied for fourth at the Farmers Insurance Open at Torrey Pines in January and hadn't had a top 10 finish since.
He missed the cut in four of his previous eight tournaments, including the U.S. Open and British Open.
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He set a scoring record in Masters Par 3 Contest.
Walker, who aced the second hole, shot an 8-under 19 in the 2016 nine-hole tournament that is held the day before the Masters starts.
And that's why he was a long shot.
Las Vegas set his odds of winning the PGA Championship at 150-1.
Still, he had been respectable in the majors. His best finishes were T8 at the Masters, T9 at the U.S Open, T26 at the British Open and T7 at the PGA.
Baltusrol ate his lunch the first time.
Walker first played Baltusrol at the 2000 U.S. Amateur as a 21-year-old in his senior year at Baylor.
It didn't go well. He failed to advance to match play.
"I just remember it was a lot of golf course for me. It was tough," Walker said.
But here's the good news: He played a practice round with Houston golfer Andy Sanders and they became friends. Sanders, forced to quit because of injuries and multiple sclerosis, is Walker's caddie.
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He got hot in 2014.
After playing in 187 events without a win on the PGA Tour, Walker won three times in the first eight events -- Frys.com Open, Sony Open and AT&T Pebble Beach. He earned $5.7 million that year.
He's an astrophotographer.
To combat loneliness on the road away from his family, Walker downloads and edits photos of distant galaxies. Several have have been honored by NASA, according to ohio.com.
Walker has had at least two of his photos selected as NASA's astronomy picture of the day, which, at last count, gave him six.
He is also rigging his home with a telescope and a sliding roof that will allow him to take photos when he's on the road.
"It's not just space photography. It's anything that has anything to do with astronomy," he said. "Thousands and thousands of pictures are submitted daily and to get one picked is pretty cool."
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