And he'll be feeling a bit of disbelief when his phone rings next weekend, whether it's during the final round or two of the NFL Draft or when he's signed as a free agent.
"It's going to be a shocker. It's going to be a shock," McMillian told Packer Report on Thursday, one day after we learned he had taken a pre-draft visit to Green Bay. "It's going to be a good day. It's going to be a good day. My family will be there, which will make it even better."
McMillian was a first-team all-conference selection and a second-team FCS All-American. At his best at the line of scrimmage, he piled up an impressive 11.5 stops for losses among his 92 tackles as a senior. He intercepted one pass and broke up five others.
Even with that, McMillian didn't think he'd be invited to the Scouting Combine. Turns out, NFL talent evaluators made the right call by letting him test with the big-school stars.
In the official Scouting Combine results provided to Packer Report, McMillian not only led the safeties with a 40-yard time of 4.47 seconds, but his 10-yard split of 1.51 also led the safety class. His vertical leap of 36.5 inches led all safeties at the Combine, and he improved upon that with a 39-inch leap at Maine's pro day.
During this week's visit with the Packers, he met with safeties coach Darren Perry. The two watched film and talked X's and O's.
"They were picking my brain and seeing what i have to offer. That went really good," McMillian said. "I enjoyed my time that I had there."
Maine was the only school that recruited McMillian.
"I'm not even sure," said the all-state quarterback and safety and honor roll student from Hillsdale, N.J., when asked why he slipped through the recruiting cracks. "Some people have asked me if I was too small, but what's small? I came out of high school at 5-11, 180."
A three-year starter at Maine, he intercepted eight passes, including five in 2009. It wasn't until this past season, however, when he thought the NFL could be something more than a dream.
And now that dream is about to come true.
"It's exciting but I just don't know where (he's going)," McMillian said. "Sometimes, you want to know where you're going to go, but then again, I like to be surprised. We'll see. That's all you can do. The whole process has been fun. It's nothing to be nervous about. It's something that you've really got to enjoy."
While Maine was McMillian's only suitor coming out of high school, several teams have him on their radar leading to next weekend. Along with the visit with Green Bay, he's had workouts with the Patriots, Jets and Giants, according to a source.
"I'm just letting them know who I really am as a person," he said of his mind-set for his visits. "It's not a sell or anything like that. I am who I am. I'm not going to put on a front or anything. This is what you're going to get."
And who is that?
"A hard-nosed player that's really going to play the game, that's really going to take notes, that's really going to listen and take coaching and apply it."
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Bill Huber is publisher of Packer Report magazine and PackerReport.com and has written for Packer Report since 1997. E-mail him at email@example.com, or leave him a question in Packer Report's subscribers-only Packers Pro Club forum. Find Bill on Twitter at twitter.com/PackerReport.