The Boston Beaneaters have scored the most runs by a team in a game against the Pittsburgh Alleghenys, with 28 runs on August 27, 1887.
Interpreted as:
team most runs scored in a regular-season game against the pirates| TEAM | R | DATE | TM | OPP | RESULT | AB | H | 2B | 3B | HR | RBI | BB | HBP | SO | SB | CS | PA | TB | XBH | SH | SF | IBB | GIDP | AVG | OBP | SLG | OPS | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | Beaneaters | 28 | 8/27/1887 |  BSN | vs |  PIT | W 28-14 | ||||||||||||||||||||||
| 2 |  | Red Stockings | 27 | 9/12/1883 |  CIN | vs | PIT | W 27-5 | ||||||||||||||||||||||
| 3 |  | Bridegrooms | 25 | 5/20/1896 |  BKN | @ | PIT | W 25-6 | ||||||||||||||||||||||
| 4 |  | Colts | 24 | 7/25/1894 |  CHI | vs | PIT | W 24-6 | ||||||||||||||||||||||
| 5 |  | Dodgers | 23 | 7/10/1943 |  BKN | vs |  PIT | W 23-6 | 43 | 20 | 5 | 1 | 1 | 21 | 11 | 0 | 2 | 2 | 0 | 55 | 30 | 7 | 1 | 1 | .465 | .574 | .698 | 1.272 | ||
| 6 |  | Phillies | 23 | 7/13/1900 |  PHI | @ | PIT | W 23-8 | ||||||||||||||||||||||
| 7 | | Reds | 23 | 8/7/1890 | CIN | vs | PTN | W 23-17 | ||||||||||||||||||||||
| 8 | Buckeyes | 23 | 6/14/1883 | COL | @ | PIT | W 23-10 | |||||||||||||||||||||||
| 9 |  | Beaneaters | 22 | 8/14/1894 |  BSN | vs | PIT | W 22-5 | ||||||||||||||||||||||
| 10 | | Grooms | 22 | 6/30/1893 | BKN | @ | PIT | W 22-16 | ||||||||||||||||||||||
| 11 | | Cubs | 21 | 4/23/2022 | CHC | vs | PIT | W 21-0 | 48 | 23 | 4 | 0 | 1 | 19 | 4 | 1 | 3 | 2 | 0 | 53 | 30 | 5 | 0 | 0 | 0 | 1 | .479 | .528 | .625 | 1.153 |
| 12 |  | Giants | 21 | 5/25/1954 |  NYG | vs | PIT | W 21-4 | 44 | 22 | 3 | 2 | 3 | 20 | 9 | 1 | 1 | 0 | 0 | 54 | 38 | 8 | 0 | 0 | 2 | 0 | .500 | .593 | .864 | 1.456 |
| 13 | | Dodgers | 21 | 6/24/1950 | BKN | vs | PIT | W 21-12 | 46 | 25 | 5 | 1 | 2 | 18 | 7 | 0 | 2 | 0 | 1 | 54 | 38 | 8 | 1 | 0 | 0 | .543 | .604 | .826 | 1.430 | |
| 14 |  | Orioles | 21 | 7/27/1883 |  BAL | vs | PIT | W 21-8 | ||||||||||||||||||||||
| 15 | | Red Stockings | 21 | 6/24/1882 | CIN | vs | PIT | W 21-4 | ||||||||||||||||||||||
| 16 | | Braves | 20 | 5/21/2021 | ATL | vs | PIT | W 20-1 | 41 | 20 | 7 | 0 | 7 | 20 | 5 | 0 | 9 | 0 | 0 | 49 | 48 | 14 | 1 | 2 | 0 | 0 | .488 | .521 | 1.171 | 1.692 |
| 17 |  | Brewers | 20 | 4/22/2010 |  MIL | @ | PIT | W 20-0 | 52 | 25 | 7 | 1 | 4 | 20 | 6 | 0 | 8 | 2 | 0 | 59 | 46 | 12 | 0 | 1 | 0 | 0 | .481 | .525 | .885 | 1.410 |
| 18 | | Giants | 20 | 6/15/1929 | NYG | @ | PIT | W 20-15 | 66 | 28 | 7 | 4 | 2 | 19 | 6 | 0 | 6 | 0 | 0 | 75 | 49 | 13 | 3 | .424 | .472 | .742 | 1.215 | |||
| 19 |  | Cardinals | 20 | 8/5/1901 |  STL | @ | PIT | W 20-6 | 53 | 21 | 3 | 3 | 0 | 15 | 1 | 1 | 3 | 0 | -9 | 56 | 30 | 6 | 1 | -9 | -9 | .396 | .418 | .566 | .984 | |
| 20 |  | Orioles | 20 | 7/20/1892 |  BAL | vs | PIT | W 20-7 | ||||||||||||||||||||||
| 21 | Spiders | 20 | 8/13/1890 | CLN | vs | PTN | W 20-9 | |||||||||||||||||||||||
| 22 | | Bridegrooms | 20 | 8/1/1890 | BKN | vs | PTN | W 20-1 | ||||||||||||||||||||||
| 23 | | Phillies | 20 | 7/21/1890 | PHN | vs | PTN | W 20-7 | ||||||||||||||||||||||
| 24 | Browns | 20 | 9/26/1883 | STL | vs | PIT | W 20-3 | |||||||||||||||||||||||
| 25 | Colonels | 20 | 9/22/1882 | LOU | @ | PIT | W 20-6 | |||||||||||||||||||||||
Results may be incomplete. StatMuse has complete team, game-level data for runs going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
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Nationals 
BAL 
ATH 
STL 
Brewers 
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