The Philadelphia Phillies and the Chicago Cubs are tied for the most wins with 20+ runs allowed in a season, with 1 win.
Interpreted as:
most wins with 20 or more runs allowed by a team in a season| TEAM | W | R | SEASON | L | W% | G | 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 |  | Phillies | 1 | 22 | 1979 | 0 | 1.000 | 1 | 17.10 | 4 | 0 | 0 | 10.0 | 26 | 19 | 6 | 3 | 0 | 0 | 59 | 0 | 3.60 | 2.70 | 1.33 | 5.40 | 6.8 | 5.1 | 2.90 | .435 | 19.80 | 23.40 |
| 2 |  | Cubs | 1 | 23 | 1922 | 0 | 1.000 | 1 | 0.00 | 5 | 0 | 1 | 9.0 | 26 | 0 | 0 | 11 | 0 | 66 | 1 | 5.00 | 11.00 | 0.45 | 0.00 | 7.6 | 16.7 | 4.11 | .520 | 23.00 | 26.00 |
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.
Mets 
Phillies 
Nationals 
Braves 
Marlins 
CHC 
TOR 
Yankees 
Tigers 
Guardians 
Astros 
Mariners 
Cardinals 
Dodgers 
Padres 
MIL 
PIT 
CIN 
COL 
BAL 
BOS 
TBR 
