Krug changed his major from finance to political science and dropped his pre-law requirements, which were not available to be completed online.
"I was pretty good at math in high school, that was the easiest subject for me," said Krug, who graduated high school with a 4.0 GPA. "I just didn't know what I wanted to get into it. I chose finance as a freshman and you really don't know what's going on your freshman year, it's kind of a whirlwind.
"You don't know exactly what type of classes that you want to take. It just was overwhelming taking a finance class and I just figured I'd take a couple history classes. It was easy to pay attention to and easy for me to follow. I enjoyed doing it and got along with the professors pretty well. That's the reason I got into political science."
Krug, who just wrapped up his sixth NHL season and set a career high in points with 51, admitted there were times along the way when it was hard to stay driven.
"I'd be lying to you if I said it wasn't hard to get motivated," said Krug. "There were definitely some times that I just wanted to sit down and relax and not think about anything. To be honest, my job takes a lot out of me, mentally and emotionally. For me to have to sit down and take a class afterwards, it's tough.
"But at the same time, we have a lot of time on our hands to be able to get it done. It was definitely tough getting motivated at times, but also seeing the light at the end of the tunnel and realizing it was something I wanted to pursue, that helped me along the way."
Plus, Krug was looking to the future. While his hockey career still has a ways to go, he wanted to make sure he put himself in the best position he could to succeed when his playing days are over.
"I didn't just finish my degree to finish it," said Krug, who also credited his wife, Melanie, and father, Kyle, for their support. "I did it because hockey is going to end at some point and there's going to be something that I'm going to want to do - work and do something that requires a degree.
"I didn't realize it, but at Michigan State and a lot of other places, the coach there has to have a degree. If you want to be part of a management group, obviously it's going to help you in some way to have your degree."