Set the mark high for the 16 lb. hammer and 35 lb. weight throwers of the future at Manhattan College. He came to the College with a national record for hammer throw of 231 feet 11 inches, a record that would stand for 23 years on the high school level. At one time, Silverio was also the Manhattan College record holder in both the 35 lb. weight (64' ¾") and the hammer throw (212' 6"). He received NCAA All American honors in 1977. His freshman year included All East Team honors for the hammer throw and a Met Championship for the hammer with a meet record of 202 feet, 7 inches. Silverio rounded out the year with a second place finish at the IC4As. He did not let a sophomore knee injury stop his career, although it derailed much of the season.

Silverio came back strong in 1979-this time hitting the record books at the Mets for the 35 lb weight with a 62 foot, 10 inch toss. He also took the Mets in the hammer that year. The IC4A champion for hammer as a junior, Silverio received All East Honors in both weight categories. In 1980, he stayed strong, taking the Met in both categories again and setting a record for the hammer with his Jasper record throw of 212' 6". That toss crushed his own record by nearly ten feet and earned him an opportunity at the Olympic trials. He also earned All East honors for the hammer throw and placed third at the IC4As as he completed his Jasper career.