During Atlanta finals, the middle block was removed. While it didn't take out any competitors, many competitors did stumble on the obstacle.
The Block Run returned on American Ninja Warrior 9, as the fourth obstacle in Los Angeles. However, the number of blocks was increased to 6, and each block varied in size. Although only 13 competitors failed on this obstacle during Los Angeles qualifiers, it eliminated 4 top competitors: Brian Kretsch, Ben Melick, Selena Laniel, and Travis Brewer.
This version of the Block Run was attempted early during Celebrity Ninja Warrior: Red Nose Day. Among the 9 celebrity competitors who attempted it, only Natalie Morales and Nikki Glaser failed.