Postseason Odds

Last update: Thu Oct 30 08:16:00 2008 PT



by Clay Davenport


One million trials

A Monte Carlo simulation uses random numbers to simulate the playoff series.
Each game of the series is given a seperate outcome probability, based on the
home team, the team's performance during the regular season, and the expected
starting pitcher matchup. Since a different sequence of random numbers is used
every day, the results may change slightly from one day to the next, even if
there was no game and no change in the pitching matchups.

DS = Division series
CS = Championship Series
WS = World Series 

---------- October 30 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000 100.0000   0.0000   Lost 4-3, lose series 4-1
CWS   0.0000   0.0000   0.0000
BOS 100.0000   0.0000   0.0000
CHC   0.0000   0.0000   0.0000
PHI 100.0000 100.0000 100.0000   Won 4-3, win series 4-1
LAD 100.0000   0.0000   0.0000
MIL   0.0000   0.0000   0.0000


---------- October 28 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000 100.0000  11.1606   Suspended at 2-2 mid 6th, trail series 3-1
CWS   0.0000   0.0000   0.0000
BOS 100.0000   0.0000   0.0000
CHC   0.0000   0.0000   0.0000
PHI 100.0000 100.0000  88.8394   Suspended at 2-2 mid 6th, lead series 3-1
LAD 100.0000   0.0000   0.0000
MIL   0.0000   0.0000   0.0000

The suspension leaves things slightly more favorable for Tampa Bay than they were
prior to the start of yesterday's game, but only just. I actually calculated these
numbers by letting the projection program assume a Ray win, and then working in
the 60.25% that the Phillies have of winning this game, based on our win expectancy
tables (home team starts bottom of sixth tied = .6025). 

---------- October 27 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000 100.0000  10.3835   Lost 10-2, trail series 3-1
CWS   0.0000   0.0000   0.0000
BOS 100.0000   0.0000   0.0000
CHC   0.0000   0.0000   0.0000
PHI 100.0000 100.0000  89.6165   Won 10-2, lead series 3-1
LAD 100.0000   0.0000   0.0000
MIL   0.0000   0.0000   0.0000

---------- October 26 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000 100.0000  30.5781   Lost 5-4, trail series 2-1
CWS   0.0000   0.0000   0.0000
BOS 100.0000   0.0000   0.0000
CHC   0.0000   0.0000   0.0000
PHI 100.0000 100.0000  69.4219   Won 5-4, lead series 2-1
LAD 100.0000   0.0000   0.0000
MIL   0.0000   0.0000   0.0000

---------- October 24 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000 100.0000  44.3638   Won 4-2, series tied 1-1
CWS   0.0000   0.0000   0.0000
BOS 100.0000   0.0000   0.0000
CHC   0.0000   0.0000   0.0000
PHI 100.0000 100.0000  55.6362   Lost 4-2, series tied 1-1
LAD 100.0000   0.0000   0.0000
MIL   0.0000   0.0000   0.0000

Essentially, now, we have a best-of-5 series to play, with Philadelphia having
home field advantage, and throwing three lefties in five games. That's why
they're still showing up with a substabtial edge.

---------- October 23 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000 100.0000  34.0345   Lost 3-2, trail series 1-0
CWS   0.0000   0.0000   0.0000
BOS 100.0000   0.0000   0.0000
CHC   0.0000   0.0000   0.0000
PHI 100.0000 100.0000  65.9655   Won 3-2, lead series 1-0
LAD 100.0000   0.0000   0.0000
MIL   0.0000   0.0000   0.0000

---------- October 20 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000 100.0000  48.2698   Won 3-1, win series 4-3
CWS   0.0000   0.0000   0.0000
BOS 100.0000   0.0000   0.0000   Lost 3-1, lose series 4-3
CHC   0.0000   0.0000   0.0000
PHI 100.0000 100.0000  51.7302   Kept waiting
LAD 100.0000   0.0000   0.0000
MIL   0.0000   0.0000   0.0000

---------- October 19 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000  44.4450  21.5487   Lost 4-2, series tied 3-3
CWS   0.0000   0.0000   0.0000
BOS 100.0000  55.5550  37.4668   Lost 4-2, series tied 3-3
CHC   0.0000   0.0000   0.0000
PHI 100.0000 100.0000  40.9845
LAD 100.0000   0.0000   0.0000
MIL   0.0000   0.0000   0.0000

Yes, Tampa has home field advantage. However, Boston with Lester has been a
better team than Tampa with Garza. Plus, TB has played appreciably worse
against LH starters, and takes a much bigger hit than Boston does for facing a
RH starter. Philadelphia's WS odds are down precisely because of those L/R
splits; with LH Moyer and Hamels, they should match up better with TB. 

---------- October 18 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000  72.4745  35.2249   Lost 8-7, lead series 3-2
CWS   0.0000   0.0000   0.0000
BOS 100.0000  27.5255  18.1383   Won 8-7, trail series 3-2
CHC   0.0000   0.0000   0.0000
PHI 100.0000 100.0000  46.6368
LAD 100.0000   0.0000   0.0000
MIL   0.0000   0.0000   0.0000

---------- October 16 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000  87.5726  42.6094   Lead series 3-1
CWS   0.0000   0.0000   0.0000
BOS 100.0000  12.4274   8.3168   Trail series 3-1
CHC   0.0000   0.0000   0.0000
PHI 100.0000 100.0000  49.0738   Won 5-1, win series 4-1
LAD 100.0000   0.0000   0.0000   Lost 5-1, lose series 4-1
MIL   0.0000   0.0000   0.0000

---------- October 15 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000  87.5770  47.2104   Won 13-4, lead series 3-1
CWS   0.0000   0.0000   0.0000
BOS 100.0000  12.4230   7.9769   Lost 13-4, trail series 3-1
CHC   0.0000   0.0000   0.0000
PHI 100.0000  85.0143  39.8423   Lead series 3-1
LAD 100.0000  14.9857   4.9704   Trail series 3-1
MIL   0.0000   0.0000   0.0000

---------- October 14 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000  68.0210  36.8884   Won 9-1, lead series 2-1
CWS   0.0000   0.0000   0.0000
BOS 100.0000  31.9790  20.4791   Lost 9-1, trail series 2-1
CHC   0.0000   0.0000   0.0000
PHI 100.0000  84.8809  37.4082   Won 7-5, lead series 3-1
LAD 100.0000  15.1191   5.2243   Lost 7-5, trail series 3-1
MIL   0.0000   0.0000   0.0000

---------- October 13 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000  40.0293  22.1128
CWS   0.0000   0.0000   0.0000
BOS 100.0000  59.9707  38.6826
CHC   0.0000   0.0000   0.0000
PHI 100.0000  66.1935  26.5652   Lost 7-2, lead series 2-1
LAD 100.0000  33.8065  12.6394   Won 7-2, trail series 2-1
MIL   0.0000   0.0000   0.0000

---------- October 12 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000  40.0205  21.6742   Won 9-8, series tied 1-1
CWS   0.0000   0.0000   0.0000
BOS 100.0000  59.9795  39.1820   Lost 9-8, series tied 1-1
CHC   0.0000   0.0000   0.0000
PHI 100.0000  76.6588  30.6502
LAD 100.0000  23.3412   8.4936
MIL   0.0000   0.0000   0.0000

---------- October 11 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000  27.9589  15.0312   Lost 2-0, trail 1-0
CWS   0.0000   0.0000   0.0000
BOS 100.0000  72.0411  46.7936   Won 2-0, lead 1-0
CHC   0.0000   0.0000   0.0000
PHI 100.0000  76.5457  29.2940   Won 8-5, lead 2-0
LAD 100.0000  23.4543   8.8812   Lost 8-5, trail 2-0
MIL   0.0000   0.0000   0.0000

---------- October 10 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000
TB  100.0000  46.9112  26.8489
CWS   0.0000   0.0000   0.0000
BOS 100.0000  53.0888  33.7071
CHC   0.0000   0.0000   0.0000
PHI 100.0000  60.1015  25.0832   Won 3-2, lead series 1-0
LAD 100.0000  39.8985  14.3608   Lost 3-2, trail series 1-0
MIL   0.0000   0.0000   0.0000

---------- October 7 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   0.0000   0.0000   0.0000   Lost 3-2, lose series 3-1
TB  100.0000  46.9355  27.9176   Won 6-2, win series 3-1
CWS   0.0000   0.0000   0.0000   Lost 6-2, lose series 3-1
BOS 100.0000  53.0645  32.7706   Won 3-2, win series 3-1
CHC   0.0000   0.0000   0.0000
PHI 100.0000  46.2775  19.1399
LAD 100.0000  53.7225  20.1719
MIL   0.0000   0.0000   0.0000

---------- October 6 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA  26.0611  13.4663   7.5731   Won 5-4, trail 2-1
TB   76.2180  39.0302  23.3689   Lost 5-3, lead 2-1
CWS  23.7820   8.5565   4.1193   Won 5-3, trail 2-1
BOS  73.9389  38.9470  24.0337   Lost 5-4, lead 2-1
CHC   0.0000   0.0000   0.0000   
PHI 100.0000  46.1934  19.2910   Won 6-2, win series 3-1
LAD 100.0000  53.8066  21.6140
MIL   0.0000   0.0000   0.0000   Lost 6-2, lose series 3-1

---------- October 5 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   9.6727   4.6430   2.5928   Trail 2-0
TB   89.5053  42.5522  25.6000   Lead 2-0
CWS  10.4947   3.7831   1.7938   Trail 2-0
BOS  90.3273  49.0217  30.4237   Lead 2-0
CHC   0.0000   0.0000   0.0000   Lost 3-1, lose series 3-0
PHI  69.3311  33.5163  13.8980   Lost 4-1, lead series 2-1
LAD 100.0000  51.6268  19.5193   Won 3-1, win series 3-0
MIL  30.6689  14.8569   6.1724   Won 4-1, trail series 2-1

---------- October 4 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA   9.5691   4.5960   2.5330   Lost 7-5, trail 2-0
TB   89.4899  42.4409  24.9471   Won 6-2, lead 2-0
CWS  10.5101   3.7776   1.7857   Lost 6-2, trail 2-0
BOS  90.4309  49.1855  30.2930   Won 7-5, lead 2-0
CHC  13.8742   9.2926   4.8054   Trail 2-0
PHI  82.3382  37.5508  15.5007   Lead 2-0
LAD  86.1258  45.1522  16.8991   Lead 2-0
MIL  17.6618   8.0044   3.2360   Trail 2-0

---------- October 3 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA  27.3460  14.3969   8.0607   
TB   69.1825  33.0691  19.3396   Won 6-4, lead 1-0
CWS  30.8175  11.5034   5.3726   Lost 6-4, trail 1-0
BOS  72.6540  41.0306  25.1529 
CHC  13.7936   9.2518   4.9365   Lost 10-3, trail 2-0
PHI  82.4253  37.7232  15.6578   Won 5-2, lead 2-0
LAD  86.2064  45.1000  18.1192   Won 10-3, lead 2-0
MIL  17.5747   7.9250   3.3607   Lost 5-2, trail 2-0


---------- October 2 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA  27.3132  14.7438   7.9143   Lost 4-1, down 1-0
TB   47.0937  23.3092  13.2035
CWS  52.9063  20.2376   9.1403
BOS  72.6868  41.7094  24.5585   Won 4-1, up 1-0
CHC  38.2185  25.1185  13.6369   Lost 7-2, down 1-0
PHI  65.3790  26.6273  11.0080   Won 3-1, up 1-0
LAD  61.7815  33.4645  14.1342   Won 7-2, up 1-0
MIL  34.6210  14.7897   6.4043   Lost 3-1, down 1-0

I did make a change from yesterday; reviewing my notes, I found I had left out
a step I used in past years which regressed pitchers back to the man for their
teams, leading to some exaggerated responses. That plus yesterday's results
push the Red Sox into the favorites role. Note the oddity that comes from a
matchup issue - Tampa is a slight underdog to Chicago in the first round, but
still more likely to survive the LCS.

---------- October 1 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA  45.9791  25.6393  12.5129
TB   51.5756  25.4336  12.8452
CWS  48.4244  15.3718   5.4360
BOS  54.0209  33.5553  19.4431
CHC  71.8831  53.4287  32.2881
PHI  45.2256  13.8896   5.0166
LAD  28.1169  14.0216   4.9657
MIL  54.7744  18.6601   7.4924


As the games get ready to start, I've got the post-season probabilities
calculated and here they are. Like last year, I am using left and right-hand
records as part of the process; it turns out that every team in the
post-season is better against left-handed pitching, with the single exception
of Tampa Bay. Its therir bad luck to match up in the first round against one
of only two teams with two left-handed starters.

I ran this set twice, once with Minnesota and once with Chicago, and took the
simple average of the results - at least until we figure out who will actually
fill that slot. 

The Cubs race out to being a clear favorite, but the program doesn't "know"
about the injury issues facing Harden and Zambrano. October 14 -
unfortunately, an off day in the NL post-season - will be the 100th
anniversary of the last Cubs' World Championship celebration, courtesy of
Orval Overall's three-hit shutout.

---------- Sept 30 ---------------------
     Win DS   Win CS   Win WS    Yesterday
LAA  45.9823  24.7034  12.0638
TB   62.5140  30.8331  15.5120
?    37.4860  12.5744   4.8247
BOS  54.0177  31.8891  18.4782
CHC  71.8324  53.3185  31.9942
PHI  45.2374  13.8974   5.1543
LAD  28.1676  14.0791   4.6073
MIL  54.7626  18.7050   7.3655



Baseball Prospectus Home

© 2008 Prospectus Entertainment Ventures