According to caribbeancricket podcast, Evin Lewis retired during his post match interview.

They said they were advised of this by multiple users in their chat during their post match analysis.

@imusic

Yes he said it in the interview it’s his last 4 day game. he said the only reason he played 4 day this year was because he told Jason Mohammed he wanted to play with him in his last year.

@imusic

yeah he did. said it was his last fc game and he basically returned because it was Jason's last season