On the 19th of November KST, Tyler Erzberger on the ESPN LOL Free Agency stream announced that T1 has extended the contract of Lee “Effort” Sang-ho, the team’s starting support player, on a two-year contract.
— ESPN Esports (@ESPN_Esports) November 19, 2019
Effort became the primary starting player for T1 during the 2019 Summer Split, overtaking Mata for stage time during this period. He went on to win his first-ever championship in the same split and made his first appearance in the World Championship this year. T1 concluded their 2019 Season at the semifinals of the 2019 World Championship.