During his high school years at Letran, he was invited to the Nike Elite Camp in 2009 along with other high school standouts and future PBA draft batchmates Baser Amer, Keith Agovida, Nico Elorde, Aljon Mariano, Troy Rosario, and Mark Cruz.

[1] Khobuntin was immediately recruited by NU Bulldogs coach Eric Altamirano after he finished high school.

[3] In his last game with NU, he posted 10 points in helping the school win its first championship after 60 years.

[4] While in the amateur ranks, Khobuntin suited up for several PBA D-League teams - Boracay Rum, BDO-NU Bulldogs, FEU-MJM Builders, and Jumbo Plastic.

[9] As of the end of 2023–24 season[10] Khobuntin saw action in the 2015 Southeast Asian Games and 2015 SEABA Championship, where the Gilas Cadets team won gold medals on both occasions.