This followed an announcement by Garena – the game's distributor in Taiwan, Hong Kong, Macau, and Southeast Asia – that it planned to merge the League of Legends Master Series (LMS) and League of Legends SEA Tour (LST) into a single tournament jointly run with Riot Games.

[4] Garena announced on 25 September 2019 that it intended to merge the LMS and LST into a single league, the details of which would be released near the end of the year.

[5] On 19 December, Riot Games announced the name of the new league, the Pacific Championship Series (PCS),[6][7][8] and a list of nine of the ten teams that would compete in it.

[15] On 13 February it was announced that G-Rex had disbanded its League of Legends team and forfeited its spot in the PCS as a result of internal restructuring by their parent company Emperor Esports Stars.

From 2024 onwards, the top three teams from the LJL would have to compete in the PCS playoffs for a spot at MSI and Worlds.

[18] Ten teams were initially selected by Riot Games as permanent franchise partners of the PCS.