The Boston Americans and the Philadelphia Phillies were tied for allowing the most runs in a season in their first 2 games, with 22 runs in 1901.
| TEAM | R | SEASON | 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 |  | Americans | 22 | 1901 | 2 | .000 | 0 | 2 | 0.00 | 3 | 0 | 0 | 16.0 | 22 | 0 | 0 | 11 | 0 | 38 | 0 | 1.69 | 6.19 | 0.27 | 0.00 | 7.9 | 28.9 | 2.06 | .917 | 12.38 | 12.38 | |
| 2 |  | Phillies | 22 | 1901 | 2 | .000 | 0 | 2 | 0.00 | 12 | 0 | 0 | 17.0 | 25 | 0 | 1 | 13 | 1 | 43 | 0 | 6.35 | 6.88 | 0.92 | 0.53 | 27.9 | 30.2 | 2.24 | 1.500 | 11.65 | 13.24 | |
| 3 |  | Brewers | 20 | 1901 | 2 | .000 | 0 | 2 | 0.00 | 7 | 0 | 0 | 17.1 | 31 | 0 | 0 | 10 | 1 | 42 | 4 | 3.63 | 5.19 | 0.70 | 0.00 | 16.7 | 23.8 | 2.37 | 1.292 | 10.38 | 16.10 | |
| 4 |  | Tigers | 18 | 1901 | 2 | 1.000 | 2 | 0 | 0.00 | 8 | 0 | 0 | 18.0 | 23 | 0 | 0 | 11 | 0 | 0 | 1 | 4.00 | 5.50 | 0.73 | 0.00 | 1.89 | -1.211 | 9.00 | 11.50 | |||
| 5 |  | Orphans | 18 | 1901 | 2 | .500 | 1 | 1 | 0.00 | 7 | 0 | 0 | 17.0 | 24 | 0 | 3 | 7 | 3 | 84 | 0 | 3.71 | 3.71 | 1.00 | 1.59 | 8.3 | 8.3 | 1.82 | .328 | 9.53 | 12.71 | |
| 6 |  | Cardinals | 17 | 1901 | 2 | .500 | 1 | 1 | 0.00 | -5 | 0 | 0 | 18.0 | 33 | 0 | 1 | 3 | 2 | 88 | 0 | -2.50 | 1.50 | -1.67 | 0.50 | -5.7 | 3.4 | 2.00 | .368 | 8.50 | 16.50 | |
| 7 |  | Athletics | 16 | 1901 | 2 | .000 | 0 | 2 | 0.00 | 9 | 0 | 0 | 18.0 | 27 | 0 | 1 | 4 | 0 | 89 | 0 | 4.50 | 2.00 | 2.25 | 0.50 | 10.1 | 4.5 | 1.72 | .347 | 8.00 | 13.50 | |
| 8 |  | Blues | 15 | 1901 | 2 | .000 | 0 | 2 | 0.00 | 4 | 0 | 0 | 16.0 | 17 | 0 | 0 | 11 | 0 | 76 | 1 | 2.25 | 6.19 | 0.36 | 0.00 | 5.3 | 14.5 | 1.75 | .279 | 8.44 | 9.56 | |
| 9 |  | Reds | 13 | 1901 | 2 | .500 | 1 | 1 | 0.00 | 11 | 0 | 0 | 18.0 | 18 | 0 | 0 | 9 | 3 | 37 | 0 | 5.50 | 4.50 | 1.22 | 0.00 | 29.7 | 24.3 | 1.50 | 1.286 | 6.50 | 9.00 | |
| 10 |  | Pirates | 12 | 1901 | 2 | .500 | 1 | 1 | 0.00 | 10 | 0 | 0 | 17.0 | 19 | 0 | 0 | 6 | 3 | 36 | 2 | 5.29 | 3.18 | 1.67 | 0.00 | 27.8 | 16.7 | 1.47 | 1.118 | 6.35 | 10.06 | |
| 11 |  | Giants | 10 | 1901 | 2 | .500 | 1 | 1 | 0.00 | 12 | 0 | 0 | 17.0 | 19 | 0 | 0 | 3 | 1 | 73 | 1 | 6.35 | 1.59 | 4.00 | 0.00 | 16.4 | 4.1 | 1.29 | .333 | 5.29 | 10.06 | |
| 12 |  | Superbas | 9 | 1901 | 2 | 1.000 | 2 | 0 | 0.00 | 10 | 0 | 0 | 18.0 | 16 | 0 | 1 | 7 | 1 | 77 | 0 | 5.00 | 3.50 | 1.43 | 0.50 | 13.0 | 9.1 | 1.28 | .259 | 4.50 | 8.00 | |
| 13 |  | Senators | 6 | 1901 | 2 | 1.000 | 2 | 0 | 0.00 | 4 | 0 | 0 | 18.0 | 18 | 0 | 0 | 5 | 0 | 73 | 0 | 2.00 | 2.50 | 0.80 | 0.00 | 5.5 | 6.8 | 1.28 | .281 | 3.00 | 9.00 | |
| 14 |  | White Sox | 5 | 1901 | 2 | 1.000 | 2 | 0 | 0.00 | 2 | 0 | 0 | 18.0 | 12 | 0 | 1 | 6 | 0 | 69 | 2 | 1.00 | 3.00 | 0.33 | 0.50 | 2.9 | 8.7 | 1.00 | .183 | 2.50 | 6.00 | |
| 15 |  | Beaneaters | 5 | 1901 | 2 | .500 | 1 | 1 | 0.00 | 11 | 1 | 0 | 17.0 | 13 | 0 | 1 | 2 | 0 | 67 | 0 | 5.82 | 1.06 | 5.50 | 0.53 | 16.4 | 3.0 | 0.88 | .226 | 2.65 | 6.88 |
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.
Yankees 
Rays 
Blue Jays 
Red Sox 
Orioles 
SEA 
SFG 
LAA 
Tigers 
Twins 
Astros 
Mets 
Phillies 
Cubs 
Brewers 
Dodgers 
COL 
MIA 
CIN 
CWS 
PIT 
WSH 
