[2] The Tigers failed to make it to the playoffs in Duncil's first year, with him playing a minor role in the rotation.

[2] In 2006 Duncil and new player Jervy Cruz emerged as the go-to guys for the Tigers as they barely made it to the playoffs, scoring 20 points or more in three of their first four games.

In the semifinals, Duncil scored 13 points to help UST force a do-or-die game for the last finals berth.

Duncil completed a pivotal three-point play in the dying seconds of the do-or-die game off Cruz's missed shot to put UST up for good and enter the finals for the first time since 1999.

[3] In Game 1 of the finals, Duncil had a cold night with 9 points as the top seed Ateneo Blue Eagles squeaked past the Tigers with a buzzer-beater lay-up by Doug Kramer to seize a 1–0 series lead.

[7] Duncil revealed that he was really born in 1983, but when the original copy from the Apalit, Pampanga civil registrar was lost, the new document showed a wrong year of birth.

He helped the Boosters win the 2011 PBA Governors Cup over Talk 'N Text, stopping the latter's attempt for a Grand Slam.

[10] He got a new career-high of 23 points against the Rain or Shine Elasto Painters, but it wasn't enough as they fell to their 13th straight loss, matching the all-time worst start in any conference.

[12] He then made six clutch free throws against the Alaska Aces as they won back-to-back games for the first time that season.