Man with last remaining perfect bracket explains his strategy

The man with the last remaining perfect bracket in this year's NCAA Tournament has been identified.

Gregg Nigl, a 40-year-old neuropsychologist from Columbus, Ohio, spoke to Daniel Wilco of NCAA.com about his perfect bracket, revealing that he almost didn't fill it out.

"I did four. And I almost didn't fill (the perfect bracket) out, because I was actually sick on Thursday, and I filled it out Thursday morning, right before the deadline, and I almost didn't do it," Nigl said. "I was lying in bed, I was sick, and I called into work. I almost went back to bed and didn't fill it out, but I did it anyway because I felt bad because it was my friend's (group)."

Nigl explained that there are several different factors that influence his picks.

"I always watch bracketology, I listen to them, take into account what they say. And then, honestly, sometimes it's which teams I like better," he said. "Some cities I like better, some teams I like better, some coaches I like better. I do look at the rankings, too. It's a combination of things.

"Don't get me wrong, a bunch of this is luck. I know that. I'm not going to say I knew every matchup by any means."

Nigl also appeared on "Good Morning America" and "Today" on Tuesday morning to discuss his perfect bracket.