19 teams are tied for giving up the fewest runs in a month, with 0 runs. The first three are the Pittsburgh Pirates in October 2023, in March 2014 and in October 2006, the Milwaukee Brewers in October 2023 and in March 2014 and the Seattle Mariners in October 2023.
| TEAM | R | MONTH | G | W% | W | L | ERA | SO | SHO | SV | IP | H | ER | HR | BB | HBP | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | H/9 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | Pirates | 0 | October 2023 | 1 | 1.000 | 1 | 0 | 0.00 | 11 | 0 | 1 | 9.0 | 3 | 0 | 0 | 1 | 0 | 0 | 30 | 1 | 11.00 | 1.00 | 11.00 | 0.00 | 36.7 | 3.3 | 0.44 | .167 | 0.00 | 3.00 |
| 2 |  | Brewers | 0 | October 2023 | 1 | 1.000 | 1 | 0 | 0.00 | 8 | 0 | 0 | 9.0 | 5 | 0 | 0 | 2 | 0 | 0 | 34 | 0 | 8.00 | 2.00 | 4.00 | 0.00 | 23.5 | 5.9 | 0.78 | .208 | 0.00 | 5.00 |
| 3 |  | Mariners | 0 | October 2023 | 1 | 1.000 | 1 | 0 | 0.00 | 11 | 0 | 1 | 9.0 | 4 | 0 | 0 | 0 | 0 | 0 | 30 | 0 | 11.00 | 0.00 | 0.00 | 36.7 | 0.0 | 0.44 | .211 | 0.00 | 4.00 | |
| 4 |  | Cubs | 0 | March 2023 | 1 | 1.000 | 1 | 0 | 0.00 | 12 | 0 | 0 | 9.0 | 4 | 0 | 0 | 5 | 0 | 0 | 34 | 1 | 12.00 | 5.00 | 2.40 | 0.00 | 35.3 | 14.7 | 1.00 | .235 | 0.00 | 4.00 |
| 5 |  | Twins | 0 | March 2023 | 1 | 1.000 | 1 | 0 | 0.00 | 11 | 0 | 1 | 9.0 | 2 | 0 | 0 | 5 | 1 | 0 | 33 | 0 | 11.00 | 5.00 | 2.20 | 0.00 | 33.3 | 15.2 | 0.78 | .125 | 0.00 | 2.00 |
| 6 |  | Yankees | 0 | March 2023 | 1 | 1.000 | 1 | 0 | 0.00 | 16 | 0 | 0 | 9.0 | 4 | 0 | 0 | 3 | 0 | 0 | 33 | 0 | 16.00 | 3.00 | 5.33 | 0.00 | 48.5 | 9.1 | 0.78 | .286 | 0.00 | 4.00 |
| 7 |  | Rays | 0 | March 2023 | 1 | 1.000 | 1 | 0 | 0.00 | 6 | 0 | 0 | 9.0 | 6 | 0 | 0 | 3 | 0 | 0 | 35 | 0 | 6.00 | 3.00 | 2.00 | 0.00 | 17.1 | 8.6 | 1.00 | .231 | 0.00 | 6.00 |
| 8 |  | Phillies | 0 | October 2017 | 1 | 1.000 | 1 | 0 | 0.00 | 11 | 0 | 0 | 9.0 | 2 | 0 | 0 | 5 | 1 | 0 | 35 | 1 | 11.00 | 5.00 | 2.20 | 0.00 | 31.4 | 14.3 | 0.78 | .111 | 0.00 | 2.00 |
| 9 | | Rays | 0 | October 2017 | 1 | 1.000 | 1 | 0 | 0.00 | 18 | 0 | 0 | 9.0 | 3 | 0 | 0 | 0 | 0 | 0 | 31 | 2 | 18.00 | 0.00 | 0.00 | 58.1 | 0.0 | 0.33 | .231 | 0.00 | 3.00 | |
| 10 | | Pirates | 0 | March 2014 | 1 | 1.000 | 1 | 0 | 0.00 | 11 | 0 | 0 | 10.0 | 6 | 0 | 0 | 4 | 0 | 0 | 38 | 0 | 9.90 | 3.60 | 2.75 | 0.00 | 28.9 | 10.5 | 1.00 | .261 | 0.00 | 5.40 |
| 11 |  | Cardinals | 0 | March 2014 | 1 | 1.000 | 1 | 0 | 0.00 | 12 | 0 | 1 | 9.0 | 3 | 0 | 0 | 5 | 0 | 1 | 36 | 1 | 12.00 | 5.00 | 2.40 | 0.00 | 33.3 | 13.9 | 0.89 | .158 | 0.00 | 3.00 |
| 12 |  | Indians | 0 | March 2014 | 1 | 1.000 | 1 | 0 | 0.00 | 7 | 0 | 1 | 9.0 | 5 | 0 | 0 | 4 | 0 | 0 | 36 | 2 | 7.00 | 4.00 | 1.75 | 0.00 | 19.4 | 11.1 | 1.00 | .200 | 0.00 | 5.00 |
| 13 |  | Brewers | 0 | March 2014 | 1 | 1.000 | 1 | 0 | 0.00 | 7 | 0 | 1 | 9.0 | 5 | 0 | 0 | 2 | 0 | 0 | 34 | 0 | 7.00 | 2.00 | 3.50 | 0.00 | 20.6 | 5.9 | 0.78 | .200 | 0.00 | 5.00 |
| 14 |  | Braves | 0 | March 2011 | 1 | 1.000 | 1 | 0 | 0.00 | 9 | 0 | 1 | 9.0 | 5 | 0 | 0 | 2 | 0 | 0 | 33 | 0 | 9.00 | 2.00 | 4.50 | 0.00 | 27.3 | 6.1 | 0.78 | .227 | 0.00 | 5.00 |
| 15 |  | Dodgers | 0 | March 2008 | 1 | 1.000 | 1 | 0 | 0.00 | 4 | 0 | 0 | 9.0 | 5 | 0 | 0 | 3 | 0 | 0 | 32 | 0 | 4.00 | 3.00 | 1.33 | 0.00 | 12.5 | 9.4 | 0.89 | .200 | 0.00 | 5.00 |
| 16 |  | Padres | 0 | March 2008 | 1 | 1.000 | 1 | 0 | 0.00 | 4 | 0 | 0 | 9.0 | 4 | 0 | 0 | 4 | 0 | 0 | 34 | 0 | 4.00 | 4.00 | 1.00 | 0.00 | 11.8 | 11.8 | 0.89 | .154 | 0.00 | 4.00 |
| 17 | | Pirates | 0 | October 2006 | 1 | 1.000 | 1 | 0 | 0.00 | 4 | 0 | 1 | 9.0 | 4 | 0 | 0 | 2 | 0 | 0 | 33 | 1 | 4.00 | 2.00 | 2.00 | 0.00 | 12.1 | 6.1 | 0.67 | .148 | 0.00 | 4.00 |
| 18 |  | Red Sox | 0 | October 2006 | 1 | 1.000 | 1 | 0 | 0.00 | 6 | 1 | 0 | 5.0 | 0 | 0 | 0 | 1 | 0 | 0 | 15 | 0 | 10.80 | 1.80 | 6.00 | 0.00 | 40.0 | 6.7 | 0.20 | .000 | 0.00 | 0.00 |
| 19 | | Dodgers | 0 | March 2003 | 1 | 1.000 | 1 | 0 | 0.00 | 7 | 1 | 0 | 9.0 | 4 | 0 | 0 | 1 | 0 | 0 | 30 | 0 | 7.00 | 1.00 | 7.00 | 0.00 | 23.3 | 3.3 | 0.56 | .182 | 0.00 | 4.00 |
| 20 |  | Royals | 0 | March 2003 | 1 | 1.000 | 1 | 0 | 0.00 | 8 | 0 | 1 | 9.0 | 3 | 0 | 0 | 2 | 0 | 0 | 31 | 0 | 8.00 | 2.00 | 4.00 | 0.00 | 25.8 | 6.5 | 0.56 | .143 | 0.00 | 3.00 |
| 21 | | Indians | 0 | March 2002 | 1 | 1.000 | 1 | 0 | 0.00 | 5 | 1 | 0 | 9.0 | 5 | 0 | 0 | 2 | 0 | 0 | 33 | 0 | 5.00 | 2.00 | 2.50 | 0.00 | 15.2 | 6.1 | 0.78 | .192 | 0.00 | 5.00 |
| 22 |  | Athletics | 0 | October 2000 | 1 | 1.000 | 1 | 0 | 0.00 | 11 | 0 | 1 | 9.0 | 6 | 0 | 0 | 2 | 1 | 1 | 36 | 0 | 11.00 | 2.00 | 5.50 | 0.00 | 30.6 | 5.6 | 0.89 | .273 | 0.00 | 6.00 |
| 23 |  | Padres | 0 | October 2000 | 1 | 1.000 | 1 | 0 | 0.00 | 6 | 0 | 1 | 9.0 | 7 | 0 | 0 | 2 | 0 | 0 | 36 | 1 | 6.00 | 2.00 | 3.00 | 0.00 | 16.7 | 5.6 | 1.00 | .250 | 0.00 | 7.00 |
| 24 | | Cardinals | 0 | March 1998 | 1 | 1.000 | 1 | 0 | 0.00 | 8 | 0 | 0 | 9.0 | 3 | 0 | 0 | 2 | 0 | 0 | 33 | 0 | 8.00 | 2.00 | 4.00 | 0.00 | 24.2 | 6.1 | 0.56 | .130 | 0.00 | 3.00 |
| 25 |  | Mets | 0 | March 1998 | 1 | 1.000 | 1 | 0 | 0.00 | 6 | 0 | 0 | 14.0 | 9 | 0 | 0 | 6 | 0 | 2 | 55 | 0 | 3.86 | 3.86 | 1.00 | 0.00 | 10.9 | 10.9 | 1.07 | .209 | 0.00 | 5.79 |
StatMuse has team, game-level data for runs allowed going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
Brewers
Cubs
Reds
Cardinals
Pirates
NYM
Phillies
Dodgers
Padres
Blue Jays
Yankees
Guardians
Tigers
Mariners
Astros
ATL
WSH
ATH
BOS
TBR
KCR
SFG
LAA
MIN
BAL
