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 Sat Apr 27 07:52:32 AM EDT 2024


Average wins by position in AL East:  95.7 90.1 86.0 81.9 76.5
AL East           W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Yankees           17   10   .554   91.7   70.3   46.03160   37.95240   83.98400
Orioles           16    9   .533   88.0   74.0   24.59230   43.34410   67.93640
Red Sox           14   13   .511   81.9   80.1    6.61010   28.11830   34.72840
Blue Jays         13   14   .535   85.2   76.8   13.46410   39.68120   53.14530
Rays              13   14   .530   83.4   78.6    9.30190   33.74620   43.04810

Average wins by position in AL Central:  89.0 83.1 78.3 72.7 58.4
AL Central        W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Guardians         18    8   .482   84.4   77.6   42.87670   12.00980   54.88650
Royals            17   10   .457   79.1   82.9   16.20530    8.81310   25.01840
Tigers            14   12   .459   76.9   85.1   10.17490    6.52580   16.70070
Twins             12   13   .506   82.5   79.5   30.71860   12.43990   43.15850
White Sox          4   22   .401   58.6  103.4     .02450     .01430     .03880

Average wins by position in AL west:  91.5 85.8 81.0 75.2 65.5
AL West           W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Mariners          14   12   .509   83.2   78.8   22.18060   20.67300   42.85360
Rangers           14   13   .527   85.8   76.2   34.43450   23.63060   58.06510
Athletics         11   16   .419   66.5   95.5     .25480     .47440     .72920
Angels            10   16   .493   77.4   84.6    6.56930    9.34610   15.91540
Astros             7   19   .573   86.1   75.9   36.56080   23.23080   59.79160

Average wins by AL First Wild Card:  91.1
Average wins by AL Second Wild Card:  87.9
Average wins by AL Third Wild Card:  85.6

Average wins by position in NL East:  99.5 88.1 79.5 71.3 64.0
NL East           W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Braves            18    6   .579   98.7   63.3   84.93990   12.85170   97.79160
Phillies          17   10   .523   87.2   74.8   12.69200   55.22890   67.92090
Mets              13   12   .485   79.7   82.3    2.24660   24.17130   26.41790
Nationals         11   14   .420   68.5   93.5     .07000    1.59300    1.66300
Marlins            6   21   .459   68.2   93.8     .05150    1.36170    1.41320

Average wins by position in NL Central:  92.9 87.2 82.9 78.5 72.6
NL Central        W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Brewers           17    8   .514   87.8   74.2   39.47410   31.06010   70.53420
Cubs              17    9   .508   86.8   75.2   33.07420   32.00930   65.08350
Reds              14   12   .500   81.4   80.6   11.49540   23.84700   35.34240
Pirates           13   14   .471   76.3   85.7    3.20130   10.50100   13.70230
Cardinals         12   14   .510   81.9   80.1   12.75500   25.16880   37.92380

Average wins by position in NL West:  98.6 86.1 79.8 74.0 64.3
NL West           W    L    Pct3  Avg W  Avg L  Champions  Wild Card   Playoffs
Dodgers           17   11   .605   98.1   63.9   89.77970    7.98090   97.76060
Padres            14   15   .488   78.8   83.2    1.93710   19.92830   21.86540
Giants            13   14   .478   77.2   84.8    1.30800   14.71130   16.01930
Diamondbacks      12   15   .529   83.3   78.7    6.94880   39.08160   46.03040
Rockies            7   19   .433   65.3   96.7     .02640     .50510     .53150

Average wins by NL First Wild Card:  91.3
Average wins by NL Second Wild Card:  87.6
Average wins by NL Third Wild Card:  85.1

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.