Less than 24 hours after the conclusion of the 2015 season, the Washington Nationals dismissed Matt Williams and the remainder of his coaching staff. Although Williams guided the team to a winning record for the second season in a row, the team fell short of their lofty preseason expectations. Williams certainly wasn't the only problem with the 2015 Nats, but that doesn't absolve him of his role in how significantly the team underachieved.
Throughout the (past two) year(s), we've spent a lot of time analyzing and over-analyzing Williams' decision-making in this space.