The Fantasy Baseball Sherpa

This time of year many fantasy baseball team owners look to trades in an effort to improve their place in the standings.  Of course, everyone’s ideal is to trade away players who will perform worse over the remainder of the season than they have year-to-date, while simultaneously trading for players who will perform better over the remainder of the season than they have year-to-date.

How should you assess a player’s year-to-date value vs. his forecasted remainder-of season value?  Using Fantasy Baseball Sherpa’s In-season Updates tool, an owner can quantify both of these values in an effort to identify players who are currently undervalued and overvalued.  Fantasy Baseball Sherpa assigns a score of 1.00 Sherpa Points to the league leader in each category.  All other players are assigned a score for that category based on their result relative to the league leader’s result.

For example, if the league leader has hit 26 HRs year-to-date, then a player who has hit 13 HRs year-to-date would be assigned a scoreof 0.50 Sherpa Points.  For ratio categories (e.g.- AVG, ERA) a proxy statistic is used.  A player’s scores in each category can be added up to determine the player’s Total Sherpa Points.  A player’s maximum score is equal to the number of categories used (note:  this maximum score will be different for Hitters and Pitchers if your league uses a different number of categories for Hitters and Pitchers).

Here are 10 National League Pitchers who are good buy-low candidates for a league using the standard 5 Pitching categories (Wins, Saves, Strikeouts, ERA, & WHIP) based on stats through games of Sun 6/21/09:

1. Rich Harden, SP, ChC (2.13 Remainder-of-Season Total Sherpa Points - 0.66 Year-to-Date Total Sherpa Points = +1.47)
2. Cole Hamels, SP, Phi (2.27 - 1.03 = +1.24)
3. Roy Oswalt, SP, Hou (1.93 - 0.78 =+1.15)
4. Johan Santana, SP, NYM (3.40 - 2.32 = +1.08)
5. Hiroki Kuroda, SP, LAD (1.48 - 0.46 = +1.02)
6. Jose Valverde, RP, Hou (1.52 - 0.56 = +0.96)
7. Ricky Nolasco, SP, Fla (0.52 - -0.26 = +0.78)
8. Carlos Zambrano, SP, ChC (1.99 - 1.24 = +0.75)
9. Tim Lincecum, SP, SF (3.27 - 2.56 = +0.71)
10. Ryan Dempster, SP, ChC (1.92 - 1.28 = +0.64)

Here are 10 National League Pitchers who are good sell-high candidates for a league using the standard 5 Pitching categories based on stats through games of Sun 6/21/09:

1. Zach Duke, SP, Pit (0.84 - 1.88 = -1.04)
2. Jason Marquis, SP, Col (0.75 - 1.55 = -0.80)
3. Jonathan Broxton, RP, LAD (1.91 - 2.61 = -0.70)
4. Livan Hernandez, SP, NYM (0.20 - 0.88 = -0.68)
5. Jeff Weaver, SP, LAD (0.01 - 0.60 = -0.59)
6. Johnny Cueto, SP, Cin (1.66 - 2.24 = -0.58)
7. Randy Wells, SP, ChC (0.43 - 1.00 = -0.57)
8. Chris Volstad, SP, Fla (0.51 - 1.02 = -0.51)
9. Brian Wilson, RP, SF (1.34 - 1.83 = -0.49)
10. Russ Ortiz, SP, Hou (0.06 - 0.55 = -0.49)

Of course, there are a number of reasons why a player’s performance over the remainder of the season may vary significantly from his performance year-to-date, including normal variation in results, injuries, changes in roles, etc.  By attempting to quantify both a player’s year-to-date and remainder-of-season results, we can take at least some of the guesswork out of identifying buy-low and sell-high candidates.

I’ll take a look at AL Hitters in my next post.

Until then,

The Sherpa

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