After his famous high school career, he played for the De La Salle Green Archers in the UAAP with equally great success.

His father, Alvin Teng, is a former player in the Philippine Basketball Association who won multiple titles as a member of the San Miguel Beermen.

The Teng brothers were frequently tutored by the power forward Alvin, who recommended that they instead develop skills associated with the guard position.

[7] At that point, no player had ever scored at least 100 points since Felix Duhig of the Cebu Institute of Technology hit the mark during a 1990 game in what is now the Cebu Schools Athletic Foundation, Inc.[8] Teng would suit up for the De La Salle Green Archers in the UAAP where he would instantly become the face of the Archers.

[11] Teng would lead the Archers back to the Final Four after missing out the previous season which included winning a knock-out game for the last slot against the FEU Tamaraws.

However, the Archers led by Teng's magic run would be stopped when they lost to one of their notable sports rivals and eventual champions, the far more seasoned Ateneo Blue Eagles.

[16] The Archers finished the elimination round with a 10–4 record, good for a three-way tie with the NU Bulldogs and the FEU Tamaraws.

[19] There they faced one of their famed rivals the UST Growling Tigers as Jeron battled the team of his older brother Jeric.

[21] Teng and the Green Archers would have another stellar season as the favorites to win the title, but they wound up losing to their arch-rivals the FEU Tamaraws after going the distance in the final four.

At that time, Teng had a career high average of 18.1 ppg, alongside 7.1 rpg, 4 apg, while shooting 75 percent from the free throw line.

Aldin Ayo would become the master strategist after winning an NCAA Basketball Championship as head coach of the Letran Knights, ending the historic five-peat of the San Beda Red Lions.

This was a monumental move for Teng's legacy as the King Archer led La Salle to a famous 12–0 run until they lost to the Ateneo Blue Eagles in their penultimate game.

Teng would win one last Mythical Five honor in his final year and carry the team through the elimination round with a 13–1 record that gave the Green Archers the first seed.

This included a historic 28 point game to clinch the series and his career, making this squad one of the most memorable rosters in collegiate basketball history.

[25] After being picked first in the PBA D-League draft, Teng suited up for the AMA University Titans and exploded with 42 points, seven rebounds, and six assists in his debut against Batangas in the Aspirant's Cup, which was the first conference of the 2017 season.

The elated Coach Altamirano, who won titles in the UAAP and the PBA quoted, "Tonight, he showed that he can also be a Lonzo Ball.

"[27] After becoming just the fourth player in D-league history to record a triple double, Teng would do it once again scoring 20 points, together with 16 rebounds and 10 assists.

Together with star Calvin Abueva, the duo helped drastically improve the Aces' record after coming off a four-game losing streak in the previous year.

[38] On February 19, 2022, he had a PBA career-high 30 points (with 14 in the fourth quarter) to rally Alaska to a win over the Terrafirma Dyip in the Governors' Cup.

[57] Along with Kiefer Ravena, Parks Jr., and Kevin Ferrer, Teng competed at the 2013 FIBA Asia 3X3 Championship as part of the Philippine national 3x3 team.

[59] Teng also starred for the 2017 Gilas Pilipinas team and led them all the way to fifth place with noteworthy performances against many of the top nations in basketball.

[63] In 2014, Teng first met Jeanine Beatrice Tsoi, a sports commentator, during UAAP Season 77 at De La Salle University.

Teng made his acting debut in the top-rated weeknight series Got to Believe (as collegiate basketball superstar "Allen Chua").