Dwyan Morgan, 64, of Lee's Summit, Missouri, had been cited in April and faced up to a year in jail and a fine of up to $1,000. The Jackson County (Missouri) Prosecutor's Office said Brady was unaware of the laser being flashed at him.
In February, the Kansas City Chiefs banned Morgan from Arrowhead Stadium for life. Lasers are prohibited at NFL games.
A cameraman from Kansas City station KMBC shot video that showed the green dot flickering around Brady's shoulder and face and footage was posted after the game, which the Patriots won 37-31 in overtime.
Morgan told Inside Edition in May that he was surprised to be cited by prosecutors and said "I shouldn't have done it," although he said he wasn't "gonna apologize to Brady or the Patriots."