The University of Maryland, Baltimore County has stolen the show in this year's 2018 NCAA Tournament.

The No. 16-seeded Retrievers defeated No. 1 Virginia 74-54 in the first round, marking the first time a No. 16 seed has pulled off the upset. No. 16 seeds were 0-135 all time against No. 1 seeds.

Virginia entered the Tournament as the No.1-overall seed, but struggled miserably on offense Friday. The Cavaliers shot just 41 percent from the field and 18 percent from the 3-point line.

Here are three takeaways from the historic upset:

1. Virginia's stingy defense failed them 

The Cavaliers had the top-ranked defense this season, leading to a top seed and No. 1 ranking during the regular season. Virginia has been built on tough defense, forcing turnovers and forcing teams to take uncomfortable shots. But they could not stop UMBC during the second half.

UMBC shot 54 percent from the field, and senior guard Jairus Lyles scored 28 points on 9-of-11 shooting. The Cavaliers lacked energy even when they were forced to make a valiant comeback, which was surprising. The Cavaliers weren't built to come from behind, and they looked like a team that didn't expect to have to Friday night.

2. UMBC will go down in history 

Not only did the small Baltimore school become the first No. 16 seed to upset a No. 1 seed, they did it convincingly. The Retrievers outscored Virginia by 20 points in the second half, completely dominating tempo. It was an all-around amazing performance that seemed legitimate.

The Retrievers lost 10 games during the season, but were locked in Friday, outrebounding the Cavaliers 33-24. This was UMBC's first-ever NCAA Tournament win, and they made it count.

3. Madness doesn't even begin to describe it 

The NCAA Tournament is famous for classic upsets, game-winning shots and busted brackets, but nothing really compares to what UMBC pulled off against Virginia. 

Virginia's 20-point loss became tied for the third-worst loss by a No. 1 seed in NCAA Tournament history, regardless of opponent's seed. Brackets everywhere were ripped to shreds well before the final whistle as Cavaliers star Kyle Guy and company failed to raise the Cavaliers out of a deep second-half hole. For those who crave upsets, Friday's was the perfect combination of shock and history. For those with Virginia winning it all, well, there's always next year.