At Arizona, DiCarlo was an NCAA Champion in the 500-yard freestyle in both 1983 and 1984 and had the uncommon distinction of earning All American honors during all four years of his swimming eligibility.

In the 1982 FINA World Aquatic Championships in Guayaquil, Ecuador, he placed sixth in the event, with Russia's Vladimir Salnikov taking the gold.

[8] In one of the high points of his swimming career, at the 1984 Olympic trials in Indianapolis, DiCarlo broke Brian Goodell's standing American records in both the 400-meter and 1,500 meter freestyles and qualified in both events with first place finishes.

DiCarlo's Gold Medal-winning 400M time was also slower than the winner of the B-final, Thomas Fahrner (West Germany), who set an Olympic record in the consolation finals (3:50.91).

He earned a Pharmacy degree at the University of Florida and gradually worked his way into becoming a Director of medical affairs in oncology for pharmaceutical company Merck.