Then-known as the Glowing Goldies, del Rosario was part of the squad which clinched the UAAP Season 27 men's basketball title.

In 1999, UST made it again to the finals with an 11–3 win-loss card only to lose again this time to a familiar foe, the De La Salle Green Archers courtesy of the game-tying three-point shot by Dino Aldeguer to send the game into overtime.

In 2001, UST wasn't able to play in the final 4 for the first time in school's history (the format was implemented in 1994) but came back in 2002 together with Cyrus Baguio.

The following year, UST didn't reach the final 4 for the second time and it signaled the end of his long coaching reign and later he was replaced by Nel Parado.

[4] He worked as an assistant coach under Tim Cone's Philippine Centennial Team that won bronze in 1998 Asian Games.

[4] Del Rosario returned to college basketball, this time coaching the Perpetual Altas in the National Collegiate Athletic Association (Philippines).