Serving as a team co-captain alongside Jameer Nelson during the 2002–03 season, Martelli earned his bachelor's degree in marketing from SJU.

During this time, the Blue Hens reached an NCAA tournament appearance in 2014 and set a program-best mark for conference wins over a five-year stretch (55).

Martelli's tenure at Delaware saw the development of notable players, including guard Devon Saddler, who set a school record with 2,222 career points.

[1] Martelli Jr.'s first season as Bryant's head coach in 2023-2024 saw the Bulldogs achieve a 20–13 overall record and an 11–5 mark in America East Conference play.

The Bulldogs also picked up a win against Florida Atlantic, ranked 10th nationally at the time; the Owls reached the Final Four in the previous year.