Brian Wilczewski is the younger brother of Chris Wilczewski who competed in American Ninja Warrior 5 and managed to defeat the Circle Cross that took out his brother to make it to Vegas. In Vegas however, he shocked everyone when he stepped too high on the Jūnidantobi and failed.
He returned in American Ninja Warrior 6 and both him and his brother managed to make it to Vegas for the second time. In Vegas, Brian made it further than last time, but he got careless and slipped on the Spider Walk portion of the Jumping Spider, in a similar fashion to Isaac Caldiero the previous season.
Similar to his debut in season 5, he competed in American Ninja Warrior 7 and finished the qualifying course in Pittsburgh after his older brother Chris failed qualifying. He made it to the Pittsbrugh finals finishing with the 10th fastest time, and made it to the Floating Monkey Bars, where he was one of the many to fall on it. Wilczewski had eventually placed 9th overall and made it to Vegas for the 3rd time in his career. This time, he got past the Jumping Spider and finished Stage 1. Brian was later one of the many stage 2 competitors to fall on Roulette Row. Like with Chris last year with the Metal Spin, the fifth obstacle on Stage 2 proved to be his best season to date.
He didn't compete in American Ninja Warrior 8 despite how he did in the previous tournament, but he was shown cheering on his brother, Chris Wilczewski. However, he returned in American Ninja Warrior 9, competing in Los Angeles this time. His run was all cut from the broadcast, but he managed to finish the qualifying course with the fourth fastest time. In the city finals, Brian fell on the Stair Hopper, an obstacle his brother faced in the previous season, but still advanced to the national finals placing 7th. In Las Vegas he shocked everyone failing Snake Run by trying to jump for the second step.
He competed on the new Team Ninja Warrior spin-off with his brother Chris and Michelle Warnky. His team name is confirmed to be the "Lab Rats", as the three of them work for the Movement Lab in Ohio. Their team just barely missed out on the championship relay, being beaten by Brian Arnold's team, Party Time.
|5||72||Failed Timbers (First Stage)|
|6||68||Failed Jumping Spider (First Stage)||Spider Walk portion.|
|7||Failed Roulette Row (Second Stage)||Digest|
|9||Failed Snake Run (First Stage)|