20 things you probably didn't know about Tom Brady

• Tom Brady is one of the best players in NFL history.
• At 41 years old, Brady led the New England Patriots to his NFL record ninth Super Bowl appearance, and with a win, he has a chance to become the only player in NFL history to earn six Super Bowl rings.
• Although Brady is one of the best-known players in the NFL, there are plenty of surprising facts about him that most casual fans just don't know.
• Check out 20 things you probably didn't know about Tom Brady below and read all of INSIDER's Super Bowl LIII coverage here.

1. Brady spent two years as a backup at the University of Michigan

Brady arrived in Ann Arbor as the seventh-string quarterback for the Michigan Wolverines. He spent two years backing up future NFL quarterback Brian Griese before winning the battle against Drew Henson to start under center during his junior season. Even after two successful years, Brady wasn't sure he would make it to the NFL, so he made a resumé as a backup plan.

Read more: Tom Brady was once an intern at Merrill Lynch — Here's his résumé from when he didn't think he'd make it in the NFL

2. He was famously taken with the 199th overall pick in the 2000 NFL Draft

That's right. 198 players were selected in that year's draft class — including six other quarterbacks — before the New England Patriots took Brady in the 6th round. It's safe to say it was the sleeper pick of the century.

Read more: WHERE ARE THEY NOW? The first-round picks from Tom Brady's infamous 2000 NFL Draft

3. He has more Super Bowl appearances than any other player in NFL history

Super Bowl LIII marks Tom Brady's ninth career Super Bowl appearance, three more than any other player in NFL history. With a win on Sunday, Brady can break his tie with pass rusher Charles Haley to win his NFL record sixth Super Bowl ring.

Read more: The NFL quarterbacks who have played in and won the most Super Bowls