He studied at Brentwood School, a private school in Essex, UK. During this time he represented the Thai national team at schoolboy level as well as being on the books of London-based club Crystal Palace. His performances for his school helped them reach the final of the 2001Independent SchoolsFA Cup, scoring 8 goals in 4 games along the way. He eventually moved to Everton for one year before returning to Thailand.
Senior career
The young forward joined Thai Premier League side BEC Tero Sasana in 2006 at age of 21 and played for the club until 2008 made totally 65 appearances scored 22 goals and won the 2008 Striker of the Year award. In 2009, a Belgian side Lierse S.K. signed the Thai star with an undisclosed deal. However, Leesaw spent most of his time with the new club in reserve team and made only 8 appearances with 1 goal. Later in the first season with the Belgian club, he was moved back to Thailand and played for Thai Premier League champions Muangthong United on a loan deal. Teeratep made 23 appearances and scored 4 goals before spending the rest of his loan spell with his former club, BEC Tero Sasana, in the same season and made 8 appearances with 3 goals. Leesaw eventually rejoined BEC Tero Sasana, leading to 15 appearances and 3 goals from the injury suffer in 2010–2011 season. In early 2012, Teeratep was on the move again to 2010–2011 Thai Premier League 4th place club, Bangkok Glass. In 2013 Teeratep played against Manchester United in a TPL All-Stars team. He scored the winning goal, beating United in David Moyes' first match in charge, during their pre-season tour.
Teeratep come to Police United in 2014 but club relegation from Thai Premier League In 2015 Teeratep play Police United in Thai Division 1 League Teerathep first goal in season against PTT Rayong at PTT Stadium home of PTT Rayong and win 2–1. On 17 October 2015 Teeratep scored his first hat trick in season against PTT Rayong at Boonyachinda Stadium home of Police United and win 6–0 and Police United promoted to the Thai Premier League.
On 24 January 2016, Winothai joined Bangkok United.
Chonburi FC
On 26 June 2019, Winothai joined Chonburi on loan from Bangkok United. He scored his first goal for Chonburi in match against PTT Rayong.
International career
Leesaw has been included in the national team setup since a very young age and is a very versatile player, playing either on the wing or as striker. Leesaw first came to the fore in the King's Cup in 2005 and has been a squad regular since, only being rested when called up to represent the nation in Olympic qualifying matches or in SEA Games. He represented Thailand in the 1999 FIFA U-17 World Championship in New Zealand. In the final of the 2005 SEA Games match against Vietnam, he scored a hat-trick, and helped Thailand claim the gold medal for the 7th consecutive time. Teeratep has been called up to new coach Peter Reid's first squad selection, to play in the T&T Cup 2008 hosted by Vietnam. Teeratep was a member of the victorious T&T Cup 2008 winning squad. On 6 March 2014, he played for Thailand against Lebanon in the 2015 AFC Asian Cup qualification, and scored a goal.
Style of play
Teeratep is known for his pace and work rate. Teeratep originally played as a striker, but could also play as a left winger or a right winger.
