Pradabsri vs. Wanheng

Pradabsri was scheduled to challenge the reigning WBC mini-flyweight champion Wanheng Menayothin on 27 November 2020, in the latter's 12th consecutive title defense. Pradabsri was at the time the #5 ranked mini-flyweight in the WBC ranking.^[18] Wanheng came into the fight as an overwhelming favorite, with one media outlet describing Pradabsri as "a completely padded 34-1, with many of those wins coming against pro debuters and opponents with losing records".^[19] Pradabsri got off to a great start, stunning Wanheng with several solid shots in the first round. Wanheng won the second round, but seemed unable to find his rhythm by the end of the fifth round. Pradabsri kept to his outfighting tactics for the remainder of the bout, and won the fight by unanimous decision, with all three judges scoring the fight 115–113 in his favor.^[20] It was Wanheng's first loss in 55 professional fights.^[21] Pradabsri was then scheduled to fight a non-title bout with Pattharapong Rueangsilanon in Pattharapong's professional debut.^[22] He won the fight by a fourth-round technical knockout.

Pradabsri vs. Ngiabphukhiaw

Pradabsri made his first WBC mini flyweight title defense against the Thai national flyweight champion Danai Ngiabphukhiaw. Pradabsri was scheduled to face the #19 ranked WBC mini flyweight contender on 2 November 2021, in Nakhon Sawan, Thailand.^[23] Pradabsri won the fight by unanimous decision. Two of the judges awarded him a 117–111 scorecard, while the third judge scored it 118–110 in his favor.^[24]

Pradabsri vs. Wanheng II

On 7 November 2021, it was revealed that Pradabsri would rematch Wanheng Menayothin on 25 January 2022, in his second WBC mini-flyweight title defense. Pradabsri and Wanheng previously met on 27 November 2020, when Pradabsri handed Wanheng his first professional loss, beating the former champion by unanimous decision.^[25] The fight was later postponed for 29 March due to the passing of Pradabsri's father.^[26] Pradabsri won the fight by unanimous decision, with all three judges scoring the bout 117–111 in his favor. The bout was closely contested up to the fourth round, with two of the three judges having it as an even 38–38 draw, after which Prababsri began to take over.^[27] He dedicated the victory to his father who had passed away earlier.^[28]

Pradabsri vs. Tanaka I & II

Pradabsri was expected to make his third title defense against the former OPBF minimumweight champion Tsubasa Koura, who was ranked at #10 by the WBC at the time of the fight's booking. On 16 August, it was announced that Koura would be replaced by the #14 ranked WBC contender Norihito Tanaka.^[29] The bout headlined a card which took place in Nakhon Ratchasima, Thailand on 30 August 2022.^[30] Pradabsri won the fight by a dominant unanimous decision, with scores of 119–109, 116–112 and 118–110.^[31]

Pradabsri was expected to make his fourth mini-flyweight title defense against the unbeaten Yudai Shigeoka on 16 April 2023, at the Yoyogi National Gymnasium in Tokyo, Japan.^[32] The title bout was booked as the main event of "3150Fight Vol. 5", which was broadcast by Abema TV.^[33] Pradabsri withdrew from the fight on April 4, after being hospitalized with strep throat and an escalating fever.^[34] As Shigeoka instead faced Wilfredo Méndez for the interim WBC title, Pradabsri was rescheduled to face Norihito Tanaka on 28 June 2023, in Rayong, Thailand. It was an immediate rematch of their 30 August 2022 bout, which Pradabsri won by unanimous decision.^[35] He won the fight by an eighth-round technical knockout.^[36]

Pradabsri vs. Shigeoka

On 7 August 2023, the World Boxing Council held a purse bid for a title unification bout between Pradabsri and interim mini-flyweight champion Yudai Shigeoka. It was won by Kameda Promotions, who submitted a winning bid of $213,000, significantly higher than the $170,000 offered by Petchyindee Boxing Promotions.^[37]