Most home runs allowed in a season (MLB team)
- Who
- Baltimore Orioles
- What
- 305 total number
- Where
- Not Applicable
- When
- 2019
The Baltimore Orioles pitching staff allowed 305 home runs in the 2019 season, the most by a team in MLB history. The previous record was 258 home runs allowed by Cincinnati Reds pitchers in 2016.