Wainwright was directly hired by
Sta. Lucia Realtors in
2000 from the
Cebu Gems where he was a star in the
Metropolitan Basketball Association. He played with the Realtors in 2000 before playing for the
Shell Turbo Chargers from 2001 to 2002. In 2003, he was acquired by the
Coca-Cola Tigers. After 4 years, Wainwright played for the
Rain or Shine Elasto Painters from 2006 to 2009. He was instrumental in transforming Rain or Shine into title contenders. In 2009, he helped the
Philippine Patriots win the inaugural
ASEAN Basketball League crown. ==Coaching career==