As a UST player, del Rosario was part of the 1964 Glowing goldies team that won the UAAP Basketball Championship that year together with Hector Hipolito, the coach of the Adamson team that battled UST in its last game of the eliminations of the 1993 season en route to the rare sweep, 14-0, that made UST the automatic champions that year.
Playing career
Del Rosario played for the collegiate basketball team of the University of Santo Tomas which participates in the UAAP Basketball Championship. Then-known as the Glowing Goldies, del Rosario was part of the squad which clinched the UAAP Season 27 men's basketball title.[2]
The University of Santo Tomas (UST) Growling Tigers appointed del Rosario as their head coach in 1991. Under his tutelage, the UST Growling Tigers achieve success in the 1990s winning 4 straight championships from 1993 up to 1996. (UAAP Seasons 56 to 59)[3] The first championship was won via a 14–0 sweep the year before the Final Four format was introduced in the University Athletic Association of the Philippines (UAAP). In the next three championships, they will beat the De La Salle Green Archers to make a dynasty in the UAAP.
In 1997, their dreams of a 5-peat were spoiled as they lose to the De La Salle Green Archers (their finals opponent from 1994 to 1996) in the final 4 despite UST holding the twice to beat advantage against La Salle. It also signaled the end of the 4-year dominance of UST. 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.
Del Rosario returned to college basketball, this time coaching the Perpetual Altas in the National Collegiate Athletic Association (Philippines). Del Rosario started in 2012, off the Altas missing the previous season's playoffs with a 5–13 record. The team made it to the playoffs in the next three years. On his fourth year, the Altas missed the playoffs despite a 11–7 record.[6]
The Del Rosario family is a basketball inclined family. Coach Aric's sons are involved in basketball. Edsel is a former player at UST while Lester is also a former player and former assistant coach to the Perpetual Altas. His grandson, Zach (Lester's son) goes with him and his dad in UPHSD basketball practices and the young Del Rosario is showing a passion for basketball.
Death
Del Rosario died on March 25, 2020, due to cardiact arrest. He was 80 years old.[4]