| Mertz Mortorelli | |
| Birth Date: | 3 March 1921 |
| Birth Place: | Ironwood, Michigan, U.S. |
| Death Place: | Superior, Wisconsin, U.S. |
| Player Sport1: | Football |
| Player Team2: | Superior State |
| Coach Sport1: | Football |
| Coach Years2: | 1954–1969 |
| Coach Team2: | Superior State |
| Coach Years3: | 1975–1983 |
| Coach Team3: | Wisconsin–Superior |
| Admin Years1: | 1954–1985 |
| Admin Team1: | Superior State / Wisconsin–Superior |
| Overall Record: | 52–176–13 (college football) |
Americo J. "Mertz" Mortorelli (March 3, 1921 – July 1, 1985) was an American football coach.[1] He served as the head football coach at the University of Wisconsin–Superior from 1954 to 1969 and from 1975 to 1983, compiling a record of 52–176–13.[2] Mortorelli attended Wisconsin–Superior when it was known as Superior State Teachers College, lettering in football, basketball, and boxing. In 1949 he received master's degrees in education and physical education from the University of Wisconsin–Madison. At Wisconsin–Superior, Mortorelli also coached wrestling, basketball, tennis, golf, and track. He died on July 1, 1985, in Superior, Wisconsin, after suffering a heart attack.[3]