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

Fantasy Baseball Sherpa

The Fantasy Baseball Sherpa’s Blog

@fantasy_sherpa on Twitter

This is the fourth in a series of posts taking a look back at the top fantasy baseball performers for 2008. Today I’ll review the top 10 Pitchers using a 5×5 NL-only format. For the purposes of this analysis I’m including CC Sabathia’s Brewers’ stats only.

1. Tim Lincecum (Preseason rank was 23) - SF, SP

• Actual stats: 227 IP, 18 W, 0 SV, 2.62 ERA, 1.17 WHIP, 265 K, 3.43 Sherpa Pts (out of a max of 5.00)
• Projected stats: 183 IP, 9 W, 0 SV, 4.28 ERA, 1.20 WHIP, 203 K, 1.73 Sherpa Pts

2. Johan Santana (1) - NYM, SP

• Actual stats: 234.1 IP, 16 W, 0 SV, 2.53 ERA, 1.15 WHIP, 206 K, 3.31 Sherpa Pts
• Projected stats: 224 IP, 15 W, 0 SV, 3.17 ERA, 1.03 WHIP, 237 K, 4.00 Sherpa Pts

3. Cole Hamels (7) - PHI, SP

• Actual stats: 227.1 IP, 14 W, 0 SV, 3.09 ERA, 1.08 WHIP, 196 K, 3.01 Sherpa Pts
• Projected stats: 187 IP, 12 IP, 0 SV, 3.75 ERA, 1.16 WHIP, 188 K, 2.44 Sherpa Pts

4. Brandon Webb (3) - ARI, SP

• Actual stats: 226.2 IP, 22 W, 0 SV, 3.30 ERA, 1.20 WHIP, 183 K, 2.80 Sherpa Pts
• Projected stats: 231 IP, 14 W, 0 SV, 3.23 ERA, 1.19 WHIP, 182 K, 3.23 Sherpa Pts

5. Dan Haren (6) - ARI, SP

• Actual stats: 216 IP, 16 W, 0 SV, 3.33 ERA, 1.13 WHIP, 206 K, 2.76 Sherpa Pts
• Projected stats: 215 IP, 13 W, 0 SV, 3.64 ERA, 1.21 WHIP, 176 K, 2.56 Sherpa Pts

6. Ryan Dempster (106) - ChC, SP

• Actual stats: 206.2 IP, 17 W, 0 SV, 2.96 ERA, 1.21 WHIP, 187 K, 2.64 Sherpa Pts
• Projected stats: 80 IP, 6 W, 0 SV, 4.50 ERA, 1.40 WHIP, 70 K, 0.53 Sherpa Pts

7. Ricky Nolasco (N/A - didn’t even have him in my preseason database!) - FLA, SP

• Actual stats: 212.1 IP, 15 W, 0 SV, 3.52 ERA, 1.10 WHIP, 186 K, 2.60 Sherpa Pts
• Projected stats: N/A

8. CC Sabathia (1 in A.L.) - MIL, SP

• Actual stats: 130.2 IP, 11 W, 0 SV, 1.65 ERA, 1.00 WHIP, 128 K, 2.58 Sherpa Pts
• Projected stats: 227 IP, 15 W, 0 SV, 3.49 ERA, 1.17 WHIP, 196 K, 3.78 Sherpa Pts

9. Derek Lowe (16) - LAD, SP

• Actual stats: 211 IP, 14 W, 0 SV, 3.24 ERA, 1.13 WHIP, 147 K, 2.46 Sherpa Pts
• Projected stats: 207 IP, 13 W, 0 SV, 3.87 ERA, 1.26 WHIP, 138 K, 2.00 Sherpa Pts

10. Ben Sheets (28) - MIL, SP

• Actual stats: 198.1 IP, 13 W, 0 SV, 3.09 ERA, 1.15 WHIP, 158 K, 2.41 Sherpa Pts
• Projected stats: 137 IP, 8 W, 0 SV, 3.88 ERA, 1.16 WHIP, 121 K, 1.58 Sherpa Pts

Ricky Nolasco was obviously a complete surprise to me, and Ryan Dempster wasn’t far behind. In theory Strikeouts and WHIP should be easier to predict than ERA, Wins, and Saves (since the latter group are more a function of randomness and factors beyond a Pitcher’s direct control), but those predictions aren’t always the most accurate in practice. Dividing the Sherpa Pts by the IP gives a decent indicator of the overall accuracy of the initial projection compared to the actual results.

You’ll also note that only 4 of the Pitchers listed above were in my preseason top 10 list. Who were the other six, and how did they fare? I’m glad you asked!

12. Jake Peavy (2) - SD, SP

• Actual stats: 173.2 IP, 10 W, 0 SV, 2.85 ERA, 1.18 WHIP, 166 K, 2.17 Sherpa Pts
• Projected stats: 216 IP, 14 W, 0 SV, 3.17 ERA, 1.11 WHIP, 230 K, 3.62 Sherpa Pts

11. Roy Oswalt (4) - HOU, SP

• Actual stats: 208.2 IP, 17 W, 0 SV, 3.54 ERA, 1.18 WHIP, 165 K, 2.33 Sherpa Pts
• Projected stats: 224 IP, 14 W, 0 SV, 3.21 ERA, 1.25 WHIP, 166 K, 2.93 Sherpa Pts

99. John Smoltz (5) - ATL, SP

• Actual stats: 28 IP, 3 W, 0 SV, 2.57 ERA, 1.18 WHIP, 36 K, 0.48 Sherpa Pts
• Projected stats: 185 IP, 13 W, 0 SV, 3.41 ERA, 1.17 WHIP, 166 K, 2.68 Sherpa Pts

98. Aaron Harang (8) - HOU, SP

• Actual stats: 184.1 IP, 6 W, 0 SV, 4.78 ERA, 1.38 WHIP, 153 K, 0.52 Sherpa Pts
• Projected stats: 222 IP, 13 W, 0 SV, 3.89 ERA, 1.21 WHIP, 200 K, 2.44 Sherpa Pts

60. Chris Young (9) - SD, SP

• Actual stats: 102.1 IP, 7 W, 0 SV, 3.96 ERA, 1.29 WHIP, 93 K, 0.85 Sherpa Pts
• Projected stats: 185 IP, 13 W, 0 SV, 3.41 ERA, 1.17 WHIP, 166 K, 2.68 Sherpa Pts

132. Rafael Soriano (10) - ATL, RP

• Actual stats: 14 IP, 0 W, 3 SV, 2.57 ERA, 1.14 WHIP, 16 K, 0.24 Sherpa Pts
• Projected stats: 74 IP, 3 W, 34 SV, 2.80 ERA, 0.95 WHIP, 76 K, 2.28 Sherpa Pts

We’re already busy here in Sherpaville developing projections for the 2009 season (we’re one of several projection providers selected for the 2009 season by Mock Draft Central!), but I’ll continue this series with a look at the 2008 top 10 Hitters in an AL-only 5×5 format as time permits.

Until next time,

The Sherpa