Career
He is known as being the lead guitarist in the heavy metal band Slipknot. Before Slipknot, Thomson was in the Death Metal band Body Pit with future Slipknot bassist, Paul Gray. When performing with Slipknot, Thomson is known as "Number Seven", being that the band follows a numbering scheme for its members, ranging from 0–8.
His number is also tattooed on his left arm, as "seven", which can be seen in music videos such as "Dead Memories".
According to Shawn Crahan, Thomson wanted number 7, because it is his lucky number.