Postseason Odds, Forecast version

Playing the rest of the season a million times

with some help from my forecasts

by Clay Davenport

See the original version of this report, based entirely on real data (no projections).

*** Now with ** 3 ** wild cards per league ***

Generated Thu Feb 6 10:12:03 EST 2025


Average wins by position in AL East:  94.6 87.9 82.9 77.8 71.1
AL East           W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Yankees            0    0   .542   88.1   73.9   38.34380   30.08260   68.42640
Orioles            0    0   .523   84.9   77.1   24.36460   30.49720   54.86180
Red Sox            0    0   .515   83.3   78.7   19.07410   28.50020   47.57430
Blue Jays          0    0   .494   79.8   82.2   10.54920   21.73110   32.28030
Rays               0    0   .481   78.1   83.9    7.66830   18.00380   25.67210

Average wins by position in AL Central:  91.5 84.5 78.9 72.5 59.7
AL Central        W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Twins              0    0   .515   84.8   77.2   37.30290   18.99370   56.29660
Guardians          0    0   .502   82.8   79.2   28.01900   18.87130   46.89030
Tigers             0    0   .485   79.8   82.2   18.00170   15.77800   33.77970
Royals             0    0   .483   79.2   82.8   16.40070   15.00060   31.40130
White Sox          0    0   .375   60.7  101.3     .27570     .40820     .68390

Average wins by position in AL west:  95.1 87.3 80.8 73.7 65.5
AL West           W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Mariners           0    0   .544   89.1   72.9   42.32160   30.32420   72.64580
Astros             0    0   .537   88.2   73.8   37.76270   31.56520   69.32790
Rangers            0    0   .506   82.3   79.7   15.98590   27.26130   43.24720
Angels             0    0   .448   72.2   89.8    2.30030    7.40090    9.70120
Athletics          0    0   .437   70.6   91.4    1.62950    5.58170    7.21120

Average wins by AL First Wild Card:  91.2
Average wins by AL Second Wild Card:  87.5
Average wins by AL Third Wild Card:  85.0

Average wins by position in NL East:  101.2 92.7 85.3 74.6 56.8
NL East           W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Braves             0    0   .600   97.2   64.8   55.69680   32.88230   88.57910
Phillies           0    0   .563   91.1   70.9   24.44400   45.42070   69.86470
Mets               0    0   .555   89.2   72.8   18.49260   43.61690   62.10950
Nationals          0    0   .473   75.8   86.2    1.36230    9.69230   11.05460
Marlins            0    0   .364   57.2  104.8     .00430     .07410     .07840

Average wins by position in NL Central:  94.3 86.4 80.7 75.0 67.8
NL Central        W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Cubs               0    0   .557   90.4   71.6   55.33320   14.48070   69.81390
Cardinals          0    0   .511   82.4   79.6   18.25630   15.40100   33.65730
Brewers            0    0   .509   82.0   80.0   17.13360   14.85390   31.98750
Reds               0    0   .471   75.6   86.4    5.53180    6.40970   11.94150
Pirates            0    0   .459   73.7   88.3    3.74510    4.58200    8.32710

Average wins by position in NL West:  105.2 92.3 83.3 74.8 55.9
NL West           W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Dodgers            0    0   .640  103.9   58.1   81.43650   15.82280   97.25930
Diamondbacks       0    0   .564   90.9   71.1   14.55300   54.57430   69.12730
Giants             0    0   .504   81.0   81.0    2.32820   23.29920   25.62740
Padres             0    0   .498   79.5   82.5    1.68060   18.83900   20.51960
Rockies            0    0   .359   56.2  105.8     .00170     .05110     .05280

Average wins by NL First Wild Card:  96.2
Average wins by NL Second Wild Card:  91.4
Average wins by NL Third Wild Card:  88.1

As the title says, the post-season odds report was compiled by running a Monte Carlo simulation of the rest of the season one million times. Current wins, losses and expected winning percentages are taken from the Adjusted Standings Report.

Expected winning percentages (EWP) is being driven entirely by the projections of player performance on our depth charts. The performances of every player on a team are combined to derive total team runs scored and allowed, which are averaged and normalized on a league basis, and used to calculate a won/lost record. The disadvantage of this approach is that the team's rating is entirely based on a projection of player performance. The advantage is that it can immediately respond to changes in the team's lineup, due to injury or trade. However, we still allow for uncertainty in the EWP by sampling a normal distribution centered on the EWP for each "seasonal" run. To simulate the normal 4% home-field advantage, the home team gets a .020 point bonus, while the visitors take a 0.020 penalty. The likelihood of winning each game is determined by the log5 method.

W and L are the team's wins and losses through yesterday's games.

Pct3 is the expected winning percentage, taken from W3 and L3, with the regression-to-mean component.

Avg W and Avg L are the average number of wins and losses each team finishes over the million season iterations.

Champions is how often, in percentage terms, this team won the championship of their division. Ties are not broken, but credited as 0.5 championships apiece (for a two-way tie), .333 apiece for a three-way tie, .25 for four-way, etc. This is why the final decimal place is not an error!

Wild Card is how often, in percentage terms, this team won the wild card. As with championships, ties are not broken, but apportioned among the tied teams.

Playoffs is how often, in percentage terms, the team either wins the division or the wild card.