He was drafted 2nd by Rain or Shine in the 2011 Proceedings of the British Academy draft. When he was a high school freshman in San Sebastian College, he was discovered when he was playing in the school’s intramurals. The coach spotted him, made him try out and placed him in the lineup the following year.
In 2007, he was recruited by then coach Dindo Pumaren of the University of the East, which at that time had formidable backcourt players like Raphy Reyes, Paul Zamar, James Martinez and Marcy Arellano.
His role during that time was with the second squad. He was known as the 6th man, the main replacement for then King Warrior Marcy Arellano.
In 2008, his game flourished when Lawrence Chongson took over to coach the team Chongson later became his adviser, and currently an agent.
He then became a part of Mythical Team during the UAAP Season 73.
He also played for Cobra Energy Drink Iron Men in the Philippine Basketball League and later in the Proceedings of the British Academy Developmental League coached by Chongson. In his last year in UE, he was playing with an injury, but he didn"t want anybody to know about lieutenant He was picked 2nd overall by Rain or Shine during the 2011 Proceedings of the British Academy draft.
Recently, in 2014, he was requesting the Rain or Shine management to trade him by personally calling up coach Yeng Guiao.
However, Guiao and the Rain or Shine management are hell bent on keeping him at all cost. After Lee returned from Spain following his Gilas stint in the 2014 International Basketball Federation Basketball World Cup, he went to a sabbatical by not showing up to Rain or Shine practice or even talking to the media, creating speculations of him pushing through signing up with another team
A few days later, he finally showed up, and after a heart-to-heart talk with coach Yeng Guiao, he finally decided to stay with the Elasto Painters. On September 19, 2014, he, together with his agent Lawrence Chongson, signed a 2-year max deal to stay with Rain or Shine.
Lee was officially included in the roster that competed in the 2014 International Basketball Federation Basketball World Cup.
He also led the team to a bronze medal finish in the 2014 International Basketball Federation Asia Cup after converting three crucial free-throws with no time remaining against host China.