UST Growling Tigers
Jarencio was appointed head coach of the UST Growling Tigers on February 21, 2006. He replaced Nel Parado whose contract expired on February 15. Parado coached the Tigers for two years, and was only able to secure 4 wins in each season. [21]
On his 16th season as a player in the PBA, his team, the Pop Cola Panthers was disbanded after the PBA franchise was sold by RFM Corporation to Coca-Cola Bottlers Philippines, Inc. This left Jarencio with no PBA team to play in and was put on inactive status. During those times, he joined the San Miguel All-Stars touring team that played goodwill games around the country.
In 2003, Jarencio had gone to UST to accompany his daughter in her enrollment and bumped into Institute of Physical Education and Athletics (IPEA) director Fr. Ermito de Sagon. Aric del Rosario had just resigned and the school was searching for their new head coach. Jarencio had no prior coaching experience so he declined Fr. de Sagon's invitation. Gina Francisco, the UST senior women's basketball team captain when Jarencio was still playing for the Glowing Goldies, persisted in convincing him to apply for the head coach position. She referred him to UST athletics moderator Mike Silbor who arranged an interview with Fr. de Sagon. He passed the interviews and was later given a one-year contract with an understanding for him to rebuild the Growling Tigers' basketball program for the next three years. [22]
In his first season as head coach in 2006, he led the Growling Tigers in defeating the heavily favored Ateneo Blue Eagles 2–1 [23] to win the UAAP Season 69 title, something that has eluded his playing career as a Glowing Goldie.
The Growling Tigers got into the UAAP finals two more times, in 2012, and in 2013, but they had not been successful in duplicating their feat in 2006. In eight seasons with Jarencio as coach, UST missed the final four on just two occasions, in 2008, and in 2010. The team also won the PCCL championship in 2012.
Jarencio resigned in 2013, at the end of UAAP Season 76, after failing to win the championship against La Salle. He had accepted an offer to coach a PBA team near the end of the first conference that year. He ended his eight-year coaching stint for the Tigers with an overall record of 56 wins against 54 losses in the elimination round, 10–8 in the postseason, highlighted by six final four and three finals appearances.
GlobalPort/NorthPort
During the years that Jarencio was coaching the Growling Tigers, he was also an assistant coach of the San Miguel Beermen in the PBA. An altercation with Yeng Guiao, his former coach at Swift became a defining low point in his coaching career.
In game six of the 2006 Philippine Cup semifinals series between San Miguel and Red Bull, Guiao threw an elbow at San Miguel player Dondon Hontiveros, who was backing up in his direction after converting a three-point jump shot. Out of anger, Jarencio, charged towards the Red Bull bench and almost came into contact with Guiao, which happened in front of the referees.
Guiao was ejected from the game after incurring two technical fouls and was later handed down a one-game suspension and a P30,000 fine. Jarencio was called for one technical foul and was later meted a P50,000 fine for improper contact with an official and also a one-game suspension. [24]
On January 9, 2014, before the start of the Commissioner's Cup, GlobalPort officially signed Jarencio to a two-year contract. He took over interim coach Richie Ticzon, who earlier replaced head coach Junel Baculi prior to his firing at the start of the season. [25]
In his first conference as GlobalPort coach, he posted a 1–8 win–loss record. [26] He ended his first season as a PBA coach with a 2–16 win–loss record.
He was fired towards the end of the 2014–15 PBA Philippine Cup despite doubling his win total in his first two conferences in the pro league at 4 wins and 5 losses. He remained with the team as a consultant. [27] On March 31, 2015, Jarencio was reappointed as the head coach of the Batang Pier. [28]
In 2013, it was reported that Jarencio will take over as coach of the Barako Bull Energy Boosters, but contract negotiations fell through. [29]
Jarencio also coached the House of Representatives Solons team in the UNTV Cup from 2016 to 2018. [30]
In January 2023, NorthPort named Jarencio as their team manager, replacing Bonnie Tan, who then became their interim head coach. [31]
On November 22, 2023, NorthPort lost 112–104 to the NLEX Road Warriors. During the game, NLEX import Thomas Robinson was involved in several collisions and had exchanged words with Jarencio in the third quarter. After the game, Jarencio and Robinson cursed each other in the tunnel. Jarencio then shouted "I'll shoot you later!" and had to be restrained by his players, security, and Commissioner Willie Marcial. [32] [33] The next day, Jarencio apologized to Marcial and explained that he was carried away by his emotions. He also planned to apologize to Robinson. [34] A week later, the PBA imposed a ₱20,000 fine on Jarencio and gave him a warning. Meanwhile, Robinson's contract was terminated by NLEX citing "his taking an unplanned vacation and skipping team practices." [33]
