The Milwaukee Brewers and the San Francisco Giants were tied for the most games in a game with 20+ runs in 1990, with 1 game.
Interpreted as:
MLB team most 20 or more run game in a regular-season game 1990 to 1990| TEAM | G | 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 |  | Brewers | 1 | 20 | 7/8/1990 |  MIL | vs |  CAL | W 20-7 | 43 | 19 | 2 | 0 | 2 | 20 | 8 | 0 | 6 | 5 | 0 | 51 | 27 | 4 | 0 | 0 | 0 | 0 | .442 | .529 | .628 | 1.157 |
| 2 |  | Giants | 1 | 23 | 6/8/1990 |  SFG | @ |  ATL | W 23-8 | 54 | 27 | 2 | 1 | 3 | 23 | 1 | 1 | 9 | 0 | 0 | 57 | 40 | 6 | 1 | 0 | 0 | 0 | .500 | .518 | .741 | 1.259 |
Some of the information used here was obtained free of charge from Retrosheet.
Cubs 
Reds 
Cardinals 
Brewers 
Pirates 
TBR 
CLE 
Mets 
Phillies 
Dodgers 
Padres 
Yankees 
Red Sox 
Tigers 
Mariners 
Athletics 
BAL 
WSH 
COL 
TOR 
LAA 
AZ 
