American Ninja Warrior 5
Jonathan Brown competed in his first season in Miami. In qualifying he ended up in 20th place as he was able to get through the first five obstacles quickly, but couldn't get up the Warped Wall. He was able to get up the Warped Wall in the finals, but wasn't able to get up the Salmon Ladder. However, he ended up placing 12th and was able to move on to the Vegas finals. In Vegas he ended up falling on the Jumping Spider.
American Ninja Warrior 6
Brown competed again in ANW 6, once again in Miami. He was able to finish the qualifying round this time, placing the 2nd fastest time at 51.11 seconds. He ended up falling on the Minefield in the finals, but that was still enough to get him into Vegas again. His run wasn't seen in Vegas but he ended up falling on the Jumping Spider again.
American Ninja Warrior 7
Jonathan Brown competed in ANW 7 in Orlando. Brown ended up taking an unbelievable approach on the Rolling Maruta, leaping the entire log entirely. However, he tried to rush through the Paddle Boards and ended up falling there in qualifying, failing to make it to Vegas this time.
American Ninja Warrior 8
He competed in Atlanta in ANW 8. He tried to rush through the Floating Steps and failed on the 5th and final step, once again failing to make it to Vegas. It was revealed Brown was one of the many veterans that were not invited back, and instead waited in the walk-on line for 23 days, only to last just 4 seconds on the course.
American Ninja Warrior 9
In American Ninja Warrior 9 he competed in Daytona qualifiers. His run was cut, but he failed the Rolling Thunder and placed 31st, just barely missing the City Finals. This is his third consecutive year failing qualifying.