Michael Kopech, one of baseball's top pitching prospects, has decided to "not participate in the 2020 season," White Sox General Manager Rick Hahn said Friday in a statement.

“Michael Kopech has informed us of his decision to not participate in the 2020 season," Hahn said. "We recognize that reaching this decision is incredibly difficult for any competitive athlete, and our organization is understanding and supportive. We will work with Michael to assure his development continues throughout 2020, and we look forward to welcoming him back into our clubhouse for the 2021 season.”

Kopech was excused from team activities last Friday, and Hahn said at the time he didn't have a timeline for the pitcher's return.