The most important player in the Chicago White Sox organization is probably Yoan Moncada. He arguably has the highest ceiling amongst every player there. He was also the main piece in the first trade the White Sox made. He was the number one prospect in the world when the White Sox traded Chris Sale to the Boston Red Sox. He has come over and lived up to the hype. It took him a while to get to that level as he struggled at first but he is elite now.
He was given a contract by the Boston Red Sox so the White Sox has yet to lock him up super long term. He is set to become a free agent after the 2023 season. That is still four seasons left but the White Sox want to make sure that Moncada lasts with them for much longer than that. He is the type of guy that the team wants leading them for the next decade or more.
He had a breakout season in 2019. 2018 was a major struggle but he turned it completely around. He was third in American League hitting with a .315 batting average. He also added in 25 home runs, 79 RBIs, and 83 runs scored. It was a huge year for the White Sox star so they need to lock him up right away.