Americo "Mertz" has compiled a 202-90-7 record during his 22 years as a wrestling coach at the University of Wisconsin-Superior. Also during that time his teams have won seven conference championships. He has had 28 N.A.I.A. All-Americans. In 1970 he hosted the N.A.I.A. National Tournament as well as the U.S. Freestyle National Wrestling Camp prior to the world Games that year.
From 1970 to 1974, Mortorelli served four teams as president of the N.A.I.A. Wrestling Coaches Association. From 1972-76, Mortorelli represented N.A.I.A. on the U.S. Olympic Wrestling Committee.
Over 40 of Mortorelli's former wrestlers are now high school coaches. He was also the athletic director and head football coach at Superior.