We've gone through the players who will likely get drafted into the NFL, but let's look at some other notable Spartans who could get drafted late or sign free agent deals.
When McDonald committed to MSU, it wasn't sure what position he'd play in college. He ended up on the offensive side and put together a solid career. He redshirted in 2008 and played little in 2009. But as a junior in 2012, he started 12 games and did not allow a sack in the regular season. (That bowl game was against Alabama, so, yeah). As a junior, he started all 14 games, allowing one sack in the regular season and led the team with 49 knockdowns and six "dominators," earning honorable mention All-Big Ten. As a senior, he was the only lineman to start every game, playing 881 of 888 snaps and earned honorable mention All-Big Ten. Chance he could be drafted in the seventh round after a good pro day, but will likely sign as a free agent somewhere.
White came to MSU in 2010 after spending one season as a JUCO player. In high school, he was a state-champion powerlifter. He was mostly a backup for his first two seasons, but recorded 25 tackles and four tackles for loss in 2011. Heading into his senior year, he was getting quite a bit of interest from NFL scouts, but he had 23 tackles (one for loss) and didn't show the ability to pass-rush as well without second-round pick Jerel Worthy next to him. Good against the run game. Could get signed to a free agent deal.
Career backup who did most of his work on special teams. Was actually pretty high on early 2013 boards before the 2012 season. Only putting him on here because he shows up on lists, for some reason.
Caper came to MSU highly-touted as a four-star running back and led MSU in carries, yards and touchdowns as a true freshman, earning freshman All-Big Ten honors. In 2010, he missed the first two games with a broken hand and suddenly found himself third on the depth chart behind Edwin Baker and Le'Veon Bell. Those two would remain atop the depth chart for the rest of his career and become NFL draft picks. Caper could have transferred somewhere to get more playing time, but he decided to stay. Chance he could get signed, but I wouldn't be surprised to see him be successful in a career outside of football.
Passed on a scholarship to Western Michigan to walk-on at MSU and then beat out Kevin Muma for the starting job in 2010. That season, went 14-for-15, was a Lou Groza Award semifinalist and earned first team All-Big Ten honors. In 2011, he went 17-for-23 and earned honorable mention All-Big Ten. Struggled as a senior, going 23-for-32. The 23 field goals were a school record. His numbers decreased as his attempts (and difficult attempts) went up, as Heck outlined a few months ago. He's got a big leg, but considering Brett Swenson is still looking for a job, hard to imagine Conroy finds a spot on an NFL squad.