4

Wins above replacement (WAR)

Javier Baez just took a big step forward in his value to the team in 2018. His WAR numbers were always pretty good, but he more than doubled his career-high in 2018 by posting a 6.3. That means that if the Cubs had replaced Javier Baez with a league average shortstop, they would have won about 89 games. That also means they wouldn't have even made the Wild Card Game.