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 Tue Sep 17 07:52:10 AM EDT 2024


Average wins by position in AL East:  94.0 90.0 82.0 79.1 77.1
AL East           W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Yankees           87   63   .573   93.9   68.1   91.81370    8.18630  100.00000
Orioles           84   66   .524   90.1   71.9    8.18630   91.42320   99.60950
Red Sox           75   75   .549   81.7   80.3     .00000    4.30220    4.30220
Rays              73   77   .460   78.3   83.7     .00000     .04060     .04060
Blue Jays         72   78   .491   78.2   83.8     .00000     .00980     .00980

Average wins by position in AL Central:  92.7 87.8 85.6 83.4 40.0
AL Central        W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Guardians         87   64   .519   92.7   69.3   98.26080    1.73880   99.99960
Royals            82   69   .498   87.6   74.4    1.46110   93.29900   94.76010
Twins             79   71   .541   85.5   76.5     .27560   70.05470   70.33030
Tigers            78   73   .475   83.8   78.2     .00250   22.18610   22.18860
White Sox         36  115   .351   40.0  122.0     .00000     .00000     .00000

Average wins by position in AL west:  88.0 82.8 77.4 69.8 65.5
AL West           W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Astros            81   69   .564   87.9   74.1   96.80090    1.04280   97.84370
Mariners          77   73   .507   82.8   79.2    3.19900    7.71490   10.91390
Rangers           71   79   .509   77.5   84.5     .00010     .00160     .00170
Athletics         65   86   .456   69.8   92.2     .00000     .00000     .00000
Angels            60   90   .428   65.6   96.4     .00000     .00000     .00000

Average wins by AL First Wild Card:  90.2
Average wins by AL Second Wild Card:  87.7
Average wins by AL Third Wild Card:  85.7

Average wins by position in NL East:  96.7 89.0 86.8 72.9 59.2
NL East           W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Phillies          90   60   .573   96.7   65.3   99.92350     .07630   99.99980
Mets              82   68   .510   87.8   74.2     .06500   50.60780   50.67280
Braves            81   69   .556   88.1   73.9     .01150   57.70440   57.71590
Nationals         68   82   .433   72.9   89.1     .00000     .00000     .00000
Marlins           55   95   .395   59.2  102.8     .00000     .00000     .00000

Average wins by position in NL Central:  92.7 83.9 81.1 78.3 76.0
NL Central        W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Brewers           87   63   .493   92.7   69.3   99.99500     .00030   99.99530
Cubs              77   73   .520   83.7   78.3     .00500     .81580     .82080
Cardinals         75   75   .487   81.1   80.9     .00000     .00970     .00970
Reds              73   78   .465   77.9   84.1     .00000     .00000     .00000
Pirates           71   79   .489   76.6   85.4     .00000     .00000     .00000

Average wins by position in NL West:  96.9 92.1 89.5 77.4 62.1
NL West           W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Dodgers           89   61   .602   96.9   65.1   97.13220    2.86770   99.99990
Padres            86   65   .544   91.7   70.3    2.73070   96.43330   99.16400
Diamondbacks      83   67   .568   89.9   72.1     .13710   91.48470   91.62180
Giants            72   78   .488   77.4   84.6     .00000     .00000     .00000
Rockies           58   93   .415   62.1   99.9     .00000     .00000     .00000

Average wins by NL First Wild Card:  92.1
Average wins by NL Second Wild Card:  90.0
Average wins by NL Third Wild Card:  88.6

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.