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July 25, 2014

Feature Focus

Visual Depth Charts

by Rob McQuown

There are two products at BP that use the name "Depth Charts." Here's a quick explanation of the differences, and a reminder that one of them is Visual Depth Charts (complete with Visual Year-to-Date stats).

  • The version that has been around the longest is the "rest of season" depth charts, wherein the team experts at Baseball Prospectus attempt to predict the playing time for the players on every roster. This displays the data that is used to generate "rest of season" PECOTA. We'll have more on this in a future edition of Feature Focus.
  • The graphical version is called Visual Depth Charts, which uses the same data as the "rest of season" depth charts. It contains a quick-look matrix of all the (batter) positions for each team, and allows selection of various stats, including WARP, TAv, FRAA, and BRR.

Both versions are accessible through the "Depth Charts" button on the navbar at the top of every BP page.

The aim of the Visual Depth Chart is convenience. To see which players enter into a positional total, simply mouse over the number and the names will appear. For example, here's the Yankees shortstop situation:

  • The numbers in parentheses by each position in the headings are averages for the league (AL or NL) at that position, for reference.
  • Clicking on the various stats (WARP, TAv, FRAA, BRR) changes the numbers in the table (and the mouseover values).
  • Clicking on the "Depth Chrt" button brings up the classic "rest of season" depth charts.

Clicking on the "Pitchers" button brings up the new Pitching Visual Depth chart, described in this article.

Clicking on "2014 Stats" brings you to the Visual Year-to-Date stats, described in this article. For instance, here's an excerpt from the BRR report, showing Billy Hamilton's great season on the basepaths:


Note: It's important to remember that rounding to one digit means that sometimes numbers don't appear to "add up," even though they do. It also bears noting that the VORP portion of WARP isn't really computed by position; rather, if a player has 80 percent of his PA at catcher, it takes 80 percent of his season-long VORP and then—for WARP—adds his FRAA at the position (divided by runs per win, of course).

That's it for Visual Depth Charts. As always, comments and suggestions are welcome.

Rob McQuown is an author of Baseball Prospectus. 
Click here to see Rob's other articles. You can contact Rob by clicking here

Related Content:  Visual,  Depth Chart,  Visual Depth Chart

5 comments have been left for this article.

<< Previous Article
The Prospectus Hit Lis... (07/25)
<< Previous Column
Feature Focus: PECOTA ... (02/13)
Next Column >>
Feature Focus: Pitch f... (07/31)
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Premium Article The View from the Loge... (07/25)

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