Breitenbach, who committed on Tuesday, beat McDonogh's Toby Hague for the 152-pound Maryland Interscholastic Athletic Association championship last season and finished 50-3 overall. Breitenbach placed 4th at National Preps to earn All-American status. He is 143-25 in his three varsity seasons.
Breitenbach will join Iowa State head coach Kevin Jackson, a 1992 Olympic gold medalist who coached Team USA in the 2008 games.
The Cyclones, winners of 8 national championships, have one of the deepest traditions in the sport. Iowa State became the first school to win 1,000 duels in 2010 and is the alma mater of legends Dan Gable and Cael Sanderson, who combined to lose one match in their college careers.
The Cyclones went 11-5 last season and finished second in the Big 12.