MLB Teams Current vs Expected Stats

    I calculated all 30 MLB teams current slugging (SLG)% and weighted on-base average (wOBA)%'s, as well as their expected stats to see if teams were underperforming or over performing their expected stats. Since I will be including the graphs that I created, I won't ramble on for every team and let the images speak for themselves. 

Note: I would like to apologize for the blurry images and the spreadsheet that is in two images rather than one at the bottom of the page. This is my first time including spreadsheets and graphs and just getting accustomed to how this will work. I will clean it up for next time.  

As you can see, the St. Louis Cardinals have the highest negative differential between their SLG% and xSLG% at -.045. The next three teams that trail the Cardinals the closest are the New York Yankees (-.041), the Washington Nationals (-.031) and the Minnesota Twins (-.031). These four teams teams are the biggest underperformers for their expected stats, so expect these clubs to start slugging more in the upcoming months. One team that is outperforming their xSLG% is the Chicago White Sox (.011). With Yasmani Grandal being out for about a month and a half, the regression monster might hit the AL Central division leaders and quite hard. 

Here is the difference between teams' wOBA and xwOBA. Similar to the SLG% differentials, the Cardinals (-.045), Yankees (-.041), Nationals (-.031) and Twins (-.031) are among the highest negative differentials. The White Sox once again have the highest positive differential between SLG% and xSLG% at .006. 

I combined the SLG%-xSLG% differentials and wOBA%-xwOBA% and as you can see, some of the unluckiest teams in the MLB right now are the St.Louis Cardinals, New York Yankees, Washington Nationals, Minnesota Twins and Oakland Athletics just by being under their expected stats. Some teams that are over performing and might regress soon are the Chicago White Sox, Los Angeles Angels and Tampa Bay Rays.