While other contenders jockey for playoff position, the Yankees, Astros and Dodgers have clearly established themselves at the top of the standings -- and as the teams everyone will be trying to knock off come October. We asked Bradford Doolittle, Sam Miller and Jeff Passan to go deep on this year's Big 3 by picking which of the trio is the team to beat, identifying potential postseason weaknesses and choosing between the three -- or the rest of the playoff field.