Mongkol Tossakrai (Thai: มงคล ทศไกร, born September 5, 1987) simply known as Yen (Thai: เย็น) is a Thai professional football player who plays as a Winger for Thai Leagues 1 club Pattaya United and the Thailand national team. He played for Krung Thai Bank in the 2008 AFC Champions League group stages.
In 2013 Mongkol was called up to the national team by Surachai Jaturapattarapong to the 2015 AFC Asian Cup qualification. In October, 2013 he debuted for Thailand in a friendly match against Bahrain, as a substitute. in October 15, 2013 Mongkol came in as a substitute against Iran in the 2015 AFC Asian Cup qualification. He scored his first international goal against Kuwait in November 2013. In November 9, 2014 Mongkol scored in a friendly match against Philippines. Mongkol was part of Thailand’s winning squad at the 2014 AFF Suzuki Cup. He scored Thailand’s first goal of the tournament in the 8th minute a 2-1 victory over hosts Singapore. Although that was the only goal he would score in the completion he was noted for his exiting play on the wings, especially in the second leg of the semi-finals against the Philippines were he constantly threatened the opponent’s defense. In May 2015, he was called up to Thailand to play in the 2018 FIFA World Cup qualification (AFC) against Vietnam.