Twenty days left. The margin for error is gone. It’s time to drill down on the teams in playoff contention. For the purposes of this exercise, we’re including only those teams within five games of a playoff spot as of Tuesday morning. In future iterations, teams will be added and subtracted as they move into and out of the playoff picture. Here are our latest contender rankings, along with one X-factor on each team who could help swing the playoff races. A 68-76 record would rank last in the NL Central. Lucky for the Twins, they’re in the AL Central. And while a lot of the attention is on rece...