[2][3] In 2014, he became the youngest fighter to ever win the Lethwei Golden Belt, obtaining the title at age 21.

By 4th grade, at the age of 9, he won his first fight at the local elementary school against a rival classmate he didn't get along with.

For a short period of time, from 2007 until 2009, he also worked at a pineapple plantation in Thailand to earn more income.

[7] His boss at the time dared him to fight some Muay Thai boys in the village which he won.

[22][23][24] Despite being both among the top ranked lethwei fighters in Myanmar currently, and fans and promoters eager to make the fight happen,[25] Tun Tun Min and Too Too have refused to fight each other due to their long-lasting friendship.

[7][31] Fans often let their voice be heard during his matches with foreign competition, shouting racist remarks and outing their discriminating opinion in interviews.

This prompted media to accuse the Myanmar Traditional Boxing Federation, who had commissioned the calendar, of discrimination.

Their first meeting was on December 7, 2014 at the inaugural Air KBZ sponsored Aung Lan Championship, currently an event where winners in each weight-class receive a belt and a triangular champions flag.

The rematch took place 4 months later on April 11, 2015 at Thuwunna National Indoor Stadium in Yangon.

He faced Australian Adem Yilmaz at Lethwei Grand Prix Japan 2016 and knockout him out at the end of the 5th round.

For his promotional debut WLC 1: The Great Beginning, he faced British Muaythai champion Nicholas Carter.

On April 7, 2017, after some encouraging words from his father he traveled to Thailand,[10] to get surgery on his right meniscus and the ligament.

[62] In their fight, held in Yangon during the Golden Belt Championship, both showed immense heart.

[64] In a last minute change, Daryl Lokuku who was set to face Dave Leduc initially, was instead scheduled to face Tun Tun Min on August 19 at the third Myanmar Lethwei World Championship in Yangon.

[67] On December 16, 2018, the trilogy fight of Dave Leduc vs. Tun Tun Min, referred as The Biggest Fight In Lethwei History, took place at the sold out Thein Pyu Stadium in Yangon, Myanmar.

This marked the first time a foreigner has ever been able to do so as it is customary to only have Myanmar born fighters come out of the red corner against non-burmese.

[71] The latter rounds saw both boxers vying for a finish, but ended without another knockout at the final bell and Leduc retained the Lethwei Golden Belt.

Tun Tun Min won all his fights and made it to the final against local hero and Kun Khmer world champion Prom Samnang and lost by decision winning the silver medal for Myanmar.

[76] The incumbent Myanmar Lethwei Champion Dave Leduc vacated the openweight Lethwei World Championship sanctioned by the MTLF vacated the title prior to the match and Thway Thit Win Hlaing and Tun Tun Min competed for the vacant title.

[77] In the event where the champion vacates the title, the two top contenders are required to fight for the belt.

In these case of the Lethwei Golden Belt, in order to have a champion, the fight cannot end in a draw, a winner must obligatory be declared even if there is no knockout.

Thway Thit Win Hlaing was declared the winner by decision and became Openweight Lethwei World Champion.

[83] The match ended as a draw with Thway Thit Win Hlaing remaining champion.