Capacio was the FEU Tamaraws' skipper during the 1983 UAAP season and the most dependable performer for rookie coach Bong Chua. He started his basketball career at Far Eastern University under coach Arturo Valenzona for two years and a year under coach Chee Poblete. He studied at Leyte Institute of Technology during high school and later moved to Manila and joined the Trinity College team for a year until graduation before moving on to FEU. Glenn's commercial basketball club experience includes playing for YCO Shine Masters and RFM-Swift Hotdogs in the PABL. Capacio also saw action for the national team under coach Joe Lipa in the 1986 Asian Games and the 1987 Jones Cup, ABC championships and SEA Games.
PBA career
He entered the PBA in 1988 as part of the original Purefoods Hotdogs team alongside Jerry Codiñera, perennial All-Star and 1988 Rookie of the YearJojo Lastimosa and later on by four-time MVP Alvin Patrimonio. Glenn played his best seasons during his nine-year career with Purefoods. Beginning the 1997 season, Capacio was traded by Purefoods to Mobiline for Cadel Mosqueda, reportedly to free up room in the team's salary cap. He played a key role in Mobiline's drive to two finals appearance in the following year during the Centennial Cup and Governors Cup. Capacio regained a spot in the All-defensive team and bagged the Comeback Player of the Year award from the PBA Press Corps by the end of the 1998 PBA season. He was an eight-time member of the All-Defensive Team and a member of the 5,000 point club, its 43rd, when he achieved the milestone on November 27, 1998. Capacio was signed by new team Batang Red Bull in 2000 to play quality minutes off the bench but an injury-plagued season with the Thunder lead him to retirement, playing just five games in his final year in 2001.
Coaching career
Capacio first started his coaching career after being hired by his college alma mater, the FEU Tamaraws, to coach its basketball team in 2007. He led the team to the Final Four in three of his four years with the team losing the semifinals in his next two years and losing to the Ateneo Blue Eagles in the 2010 finals. Capacio left FEU to coach the AirAsia Philippine Patriots of the fledgling ASEAN Basketball League and leading the team to the title in the league's first season. In 2012, the Patriots franchise folded after team owner Mikee Romero had his franchise application to the PBA accepted. Capacio took over as the interim head coach for the team. On January 2013, the team announced that it hired Junel Baculi as their permanent head coach. Capacio was relegated to being the first assistant coach of the team. After the 2013–14 season, Capacio signed with expansion team Kia Sorento as one of their assistant coaches expected to fill the void whenever head coach Manny Pacquiao is unable to attend to the team. After players Alex Nuyles and Mike Burtscher voiced out to social media their frustration to the team, Capacio decided to follow suit. Capacio said that he was unduly terminated by the team because of his failure to attend team meetings. He also said that he was fired as early as January 2015, and with 18 months still left in his contact, the team offered to buy out only three months of his contact, to which he refused. He has since filed a case against the team. After an uneventful stint with Kia, Capacio decided to go back to the college ranks, where he served as an assistant coach under Aldin Ayo for the Letran Knights of the NCAA Philippines that won the basketball title in 2015. After Ayo was tapped to be the head coach of the De La Salle Green Archers of the UAAP, he, along with other members of the coaching staff, followed. He won another title there, his first in the UAAP as a coach.
Coaching record
Personal
He has three brothers who play basketball with the eldest, Ely Capacio, being a national team player and played for Tanduay in the PBA. His son, Gwynne Matthew, played college basketball for the Ateneo Blue Eagles.
