Career
He began his professional career in 1996. He reached his highest individual ranking in the Association of Tennis Professionals Tour on October 11, 1999, when he became World Number. His best tournament result was at the 1999 San Jose tournament.
As a qualifier he defeated Kenneth Carlsen, Andre Agassi (although Agassi was up 6–0 6–6 before he defaulted), Mark Woodforde, and Michael Chang before losing to Aussie Mark Philippoussis 6–3 6–2.
As of June 7, 2010, Mamiit"s singles ranking is World Number. 497. He lost the final of the 2010 United States Open National Playoffs to Blake Strode.
By winning, Strode received a USTA wild card into the 2010 United States. Open singles qualifying draw. Singles (7).