Baltimore Orioles vs Seattle Mariners head-to-head
Who has won more, the Baltimore Orioles or the Seattle Mariners?
Baltimore Orioles lead the series 146-135 in 281 meetings since Apr 9, 1993. They average 4.4 to 4.6. The last meeting was Jun 18, 2026, 3-0.
- Record
- Baltimore Orioles 146-135 Seattle Mariners
- Games
- 281
- Points per game
- 4.4 – 4.6
- Biggest win
- Seattle Mariners by 14
4 of those 281 games were in the postseason.
Every meeting on file
| Jun 18, 2026 |  BAL at  SEA | 0-3 | Seattle Mariners | Regular |
| Jun 17, 2026 | BAL at SEA | 5-3 | Baltimore Orioles | Regular |
| Jun 16, 2026 | BAL at SEA | 1-3 | Seattle Mariners | Regular |
| Jun 11, 2026 | SEA at BAL | 5-7 | Baltimore Orioles | Regular |
| Jun 10, 2026 | SEA at BAL | 2-7 | Baltimore Orioles | Regular |
| Jun 9, 2026 | SEA at BAL | 6-5 | Seattle Mariners | Regular |
| Jun 8, 2026 | SEA at BAL | 6-3 | Seattle Mariners | Regular |
| Aug 14, 2025 | SEA at BAL | 3-5 | Baltimore Orioles | Regular |
| Aug 13, 2025 | SEA at BAL | 3-4 | Baltimore Orioles | Regular |
| Aug 12, 2025 | SEA at BAL | 1-0 | Seattle Mariners | Regular |
| Jun 5, 2025 | BAL at SEA | 4-3 | Baltimore Orioles | Regular |
| Jun 4, 2025 | BAL at SEA | 3-2 | Baltimore Orioles | Regular |
| Jun 3, 2025 | BAL at SEA | 5-1 | Baltimore Orioles | Regular |
| Jul 4, 2024 | BAL at SEA | 3-7 | Seattle Mariners | Regular |
| Jul 3, 2024 | BAL at SEA | 4-1 | Baltimore Orioles | Regular |
| Jul 2, 2024 | BAL at SEA | 2-0 | Baltimore Orioles | Regular |
| May 19, 2024 | SEA at BAL | 3-6 | Baltimore Orioles | Regular |
| May 18, 2024 | SEA at BAL | 4-3 | Seattle Mariners | Regular |
| May 17, 2024 | SEA at BAL | 2-9 | Baltimore Orioles | Regular |
| Aug 13, 2023 | BAL at SEA | 5-3 | Baltimore Orioles | Regular |
| Aug 12, 2023 | BAL at SEA | 1-0 | Baltimore Orioles | Regular |
| Aug 11, 2023 | BAL at SEA | 2-9 | Seattle Mariners | Regular |
| Jun 25, 2023 | SEA at BAL | 2-3 | Baltimore Orioles | Regular |
| Jun 24, 2023 | SEA at BAL | 4-6 | Baltimore Orioles | Regular |
| Jun 23, 2023 | SEA at BAL | 13-1 | Seattle Mariners | Regular |
| Jun 29, 2022 | BAL at SEA | 3-9 | Seattle Mariners | Regular |
| Jun 28, 2022 | BAL at SEA | 0-2 | Seattle Mariners | Regular |
| Jun 27, 2022 | BAL at SEA | 9-2 | Baltimore Orioles | Regular |
| Jun 2, 2022 | SEA at BAL | 7-6 | Seattle Mariners | Regular |
| Jun 1, 2022 | SEA at BAL | 2-9 | Baltimore Orioles | Regular |
| May 31, 2022 | SEA at BAL | 10-0 | Seattle Mariners | Regular |
| May 5, 2021 | BAL at SEA | 6-0 | Baltimore Orioles | Regular |
| May 4, 2021 | BAL at SEA | 2-5 | Seattle Mariners | Regular |
| May 3, 2021 | BAL at SEA | 5-3 | Baltimore Orioles | Regular |
| Apr 15, 2021 | SEA at BAL | 2-1 | Seattle Mariners | Regular |
| Apr 15, 2021 | SEA at BAL | 4-2 | Seattle Mariners | Regular |
| Apr 13, 2021 | SEA at BAL | 4-3 | Seattle Mariners | Regular |
| Apr 13, 2021 | SEA at BAL | 6-7 | Baltimore Orioles | Regular |
| Sep 22, 2019 | SEA at BAL | 1-2 | Baltimore Orioles | Regular |
| Sep 21, 2019 | SEA at BAL | 7-6 | Seattle Mariners | Regular |
| Sep 20, 2019 | SEA at BAL | 3-5 | Baltimore Orioles | Regular |
| Jun 23, 2019 | BAL at SEA | 3-13 | Seattle Mariners | Regular |
| Jun 22, 2019 | BAL at SEA | 8-4 | Baltimore Orioles | Regular |
| Jun 21, 2019 | BAL at SEA | 9-10 | Seattle Mariners | Regular |
| Jun 20, 2019 | BAL at SEA | 2-5 | Seattle Mariners | Regular |
| Jun 28, 2018 | SEA at BAL | 4-2 | Seattle Mariners | Regular |
| Jun 27, 2018 | SEA at BAL | 8-7 | Seattle Mariners | Regular |
| Jun 26, 2018 | SEA at BAL | 3-2 | Seattle Mariners | Regular |
| Jun 25, 2018 | SEA at BAL | 5-3 | Seattle Mariners | Regular |
| Aug 30, 2017 | SEA at BAL | 7-8 | Baltimore Orioles | Regular |
| Aug 29, 2017 | SEA at BAL | 0-4 | Baltimore Orioles | Regular |
| Aug 28, 2017 | SEA at BAL | 6-7 | Baltimore Orioles | Regular |
| Aug 16, 2017 | BAL at SEA | 6-7 | Seattle Mariners | Regular |
| Aug 15, 2017 | BAL at SEA | 1-3 | Seattle Mariners | Regular |
| Aug 14, 2017 | BAL at SEA | 11-3 | Baltimore Orioles | Regular |
| Jul 3, 2016 | BAL at SEA | 4-9 | Seattle Mariners | Regular |
| Jul 2, 2016 | BAL at SEA | 6-12 | Seattle Mariners | Regular |
| Jul 1, 2016 | BAL at SEA | 2-5 | Seattle Mariners | Regular |
| Jun 30, 2016 | BAL at SEA | 3-5 | Seattle Mariners | Regular |
| May 19, 2016 | SEA at BAL | 7-2 | Seattle Mariners | Regular |
| May 18, 2016 | SEA at BAL | 2-5 | Baltimore Orioles | Regular |
| May 17, 2016 | SEA at BAL | 10-0 | Seattle Mariners | Regular |
| Aug 12, 2015 | BAL at SEA | 0-3 | Seattle Mariners | Regular |
| Aug 11, 2015 | BAL at SEA | 5-6 | Seattle Mariners | Regular |
| Aug 10, 2015 | BAL at SEA | 3-2 | Baltimore Orioles | Regular |
| May 21, 2015 | SEA at BAL | 4-5 | Baltimore Orioles | Regular |
| May 20, 2015 | SEA at BAL | 4-2 | Seattle Mariners | Regular |
| May 19, 2015 | SEA at BAL | 4-9 | Baltimore Orioles | Regular |
| Aug 3, 2014 | SEA at BAL | 0-1 | Baltimore Orioles | Regular |
| Aug 2, 2014 | SEA at BAL | 6-3 | Seattle Mariners | Regular |
| Aug 1, 2014 | SEA at BAL | 1-2 | Baltimore Orioles | Regular |
| Jul 27, 2014 | BAL at SEA | 3-2 | Baltimore Orioles | Regular |
| Jul 26, 2014 | BAL at SEA | 3-4 | Seattle Mariners | Regular |
| Jul 25, 2014 | BAL at SEA | 2-1 | Baltimore Orioles | Regular |
| Jul 24, 2014 | BAL at SEA | 4-0 | Baltimore Orioles | Regular |
| Aug 4, 2013 | SEA at BAL | 3-2 | Seattle Mariners | Regular |
| Aug 3, 2013 | SEA at BAL | 8-4 | Seattle Mariners | Regular |
| Aug 2, 2013 | SEA at BAL | 8-11 | Baltimore Orioles | Regular |
| May 1, 2013 | BAL at SEA | 3-8 | Seattle Mariners | Regular |
| Apr 30, 2013 | BAL at SEA | 7-2 | Baltimore Orioles | Regular |
| Apr 29, 2013 | BAL at SEA | 2-6 | Seattle Mariners | Regular |
| Sep 19, 2012 | BAL at SEA | 3-1 | Baltimore Orioles | Regular |
| Sep 18, 2012 | BAL at SEA | 4-2 | Baltimore Orioles | Regular |
| Sep 17, 2012 | BAL at SEA | 10-4 | Baltimore Orioles | Regular |
| Aug 8, 2012 | SEA at BAL | 2-9 | Baltimore Orioles | Regular |
| Aug 7, 2012 | SEA at BAL | 7-8 | Baltimore Orioles | Regular |
| Aug 6, 2012 | SEA at BAL | 1-3 | Baltimore Orioles | Regular |
| Jul 4, 2012 | BAL at SEA | 4-2 | Baltimore Orioles | Regular |
| Jul 3, 2012 | BAL at SEA | 5-4 | Baltimore Orioles | Regular |
| Jul 2, 2012 | BAL at SEA | 3-6 | Seattle Mariners | Regular |
| Jun 1, 2011 | BAL at SEA | 2-1 | Baltimore Orioles | Regular |
| May 31, 2011 | BAL at SEA | 2-3 | Seattle Mariners | Regular |
| May 30, 2011 | BAL at SEA | 3-4 | Seattle Mariners | Regular |
| May 12, 2011 | SEA at BAL | 1-2 | Baltimore Orioles | Regular |
| May 11, 2011 | SEA at BAL | 2-4 | Baltimore Orioles | Regular |
| May 10, 2011 | SEA at BAL | 6-7 | Baltimore Orioles | Regular |
| Aug 18, 2010 | SEA at BAL | 6-5 | Seattle Mariners | Regular |
| Aug 17, 2010 | SEA at BAL | 4-0 | Seattle Mariners | Regular |
| Aug 16, 2010 | SEA at BAL | 4-5 | Baltimore Orioles | Regular |
| May 13, 2010 | SEA at BAL | 5-6 | Baltimore Orioles | Regular |
| May 12, 2010 | SEA at BAL | 2-5 | Baltimore Orioles | Regular |
| May 11, 2010 | SEA at BAL | 5-1 | Seattle Mariners | Regular |
| Apr 21, 2010 | BAL at SEA | 1-4 | Seattle Mariners | Regular |
| Apr 20, 2010 | BAL at SEA | 1-3 | Seattle Mariners | Regular |
| Apr 19, 2010 | BAL at SEA | 2-8 | Seattle Mariners | Regular |
| Jul 8, 2009 | BAL at SEA | 5-3 | Baltimore Orioles | Regular |
| Jul 7, 2009 | BAL at SEA | 12-4 | Baltimore Orioles | Regular |
| Jul 6, 2009 | BAL at SEA | 0-5 | Seattle Mariners | Regular |
| Jun 11, 2009 | SEA at BAL | 6-3 | Seattle Mariners | Regular |
| Jun 10, 2009 | SEA at BAL | 4-1 | Seattle Mariners | Regular |
| Jun 9, 2009 | SEA at BAL | 1-3 | Baltimore Orioles | Regular |
| Jun 3, 2009 | BAL at SEA | 2-3 | Seattle Mariners | Regular |
| Jun 2, 2009 | BAL at SEA | 2-8 | Seattle Mariners | Regular |
| Jun 1, 2009 | BAL at SEA | 1-0 | Baltimore Orioles | Regular |
| Aug 3, 2008 | BAL at SEA | 4-8 | Seattle Mariners | Regular |
| Aug 2, 2008 | BAL at SEA | 3-1 | Baltimore Orioles | Regular |
| Aug 1, 2008 | BAL at SEA | 10-5 | Baltimore Orioles | Regular |
| Apr 24, 2008 | BAL at SEA | 8-7 | Baltimore Orioles | Regular |
| Apr 23, 2008 | BAL at SEA | 3-2 | Baltimore Orioles | Regular |
| Apr 22, 2008 | BAL at SEA | 2-4 | Seattle Mariners | Regular |
| Apr 7, 2008 | SEA at BAL | 4-5 | Baltimore Orioles | Regular |
| Apr 6, 2008 | SEA at BAL | 2-3 | Baltimore Orioles | Regular |
| Apr 5, 2008 | SEA at BAL | 4-6 | Baltimore Orioles | Regular |
| Apr 4, 2008 | SEA at BAL | 4-7 | Baltimore Orioles | Regular |
| Aug 9, 2007 | SEA at BAL | 13-8 | Seattle Mariners | Regular |
| Aug 8, 2007 | SEA at BAL | 8-4 | Seattle Mariners | Regular |
| Aug 7, 2007 | SEA at BAL | 10-3 | Seattle Mariners | Regular |
| Jul 18, 2007 | BAL at SEA | 5-6 | Seattle Mariners | Regular |
| Jul 17, 2007 | BAL at SEA | 8-3 | Baltimore Orioles | Regular |
| Jul 16, 2007 | BAL at SEA | 2-4 | Seattle Mariners | Regular |
| Jun 6, 2007 | BAL at SEA | 9-5 | Baltimore Orioles | Regular |
| Jun 5, 2007 | BAL at SEA | 4-5 | Seattle Mariners | Regular |
| Jun 4, 2007 | BAL at SEA | 4-7 | Seattle Mariners | Regular |
| Aug 2, 2006 | SEA at BAL | 2-1 | Seattle Mariners | Regular |
| Aug 1, 2006 | SEA at BAL | 0-2 | Baltimore Orioles | Regular |
| Jul 31, 2006 | SEA at BAL | 10-5 | Seattle Mariners | Regular |
| May 25, 2006 | BAL at SEA | 2-0 | Baltimore Orioles | Regular |
| May 24, 2006 | BAL at SEA | 4-7 | Seattle Mariners | Regular |
| May 23, 2006 | BAL at SEA | 14-4 | Baltimore Orioles | Regular |
| May 22, 2006 | BAL at SEA | 6-8 | Seattle Mariners | Regular |
| Apr 30, 2006 | SEA at BAL | 4-3 | Seattle Mariners | Regular |
| Apr 29, 2006 | SEA at BAL | 8-6 | Seattle Mariners | Regular |
| Apr 28, 2006 | SEA at BAL | 2-5 | Baltimore Orioles | Regular |
| Jul 17, 2005 | BAL at SEA | 2-8 | Seattle Mariners | Regular |
| Jul 16, 2005 | BAL at SEA | 2-3 | Seattle Mariners | Regular |
| Jul 15, 2005 | BAL at SEA | 6-3 | Baltimore Orioles | Regular |
| Jul 14, 2005 | BAL at SEA | 5-3 | Baltimore Orioles | Regular |
| May 26, 2005 | SEA at BAL | 2-5 | Baltimore Orioles | Regular |
| May 25, 2005 | SEA at BAL | 1-3 | Baltimore Orioles | Regular |
| May 24, 2005 | SEA at BAL | 2-3 | Baltimore Orioles | Regular |
| Aug 4, 2004 | SEA at BAL | 3-6 | Baltimore Orioles | Regular |
| Aug 3, 2004 | SEA at BAL | 7-9 | Baltimore Orioles | Regular |
| Aug 3, 2004 | SEA at BAL | 4-5 | Baltimore Orioles | Regular |
| May 20, 2004 | BAL at SEA | 0-11 | Seattle Mariners | Regular |
| May 19, 2004 | BAL at SEA | 5-2 | Baltimore Orioles | Regular |
| May 18, 2004 | BAL at SEA | 7-2 | Baltimore Orioles | Regular |
| Apr 29, 2004 | SEA at BAL | 5-9 | Baltimore Orioles | Regular |
| Apr 28, 2004 | SEA at BAL | 1-3 | Baltimore Orioles | Regular |
| Apr 27, 2004 | SEA at BAL | 7-5 | Seattle Mariners | Regular |
| Sep 7, 2003 | SEA at BAL | 1-2 | Baltimore Orioles | Regular |
| Sep 6, 2003 | SEA at BAL | 1-3 | Baltimore Orioles | Regular |
| Sep 5, 2003 | SEA at BAL | 6-4 | Seattle Mariners | Regular |
| Aug 31, 2003 | BAL at SEA | 0-3 | Seattle Mariners | Regular |
| Aug 30, 2003 | BAL at SEA | 1-13 | Seattle Mariners | Regular |
| Aug 29, 2003 | BAL at SEA | 2-3 | Seattle Mariners | Regular |
| Jul 10, 2003 | BAL at SEA | 4-1 | Baltimore Orioles | Regular |
| Jul 9, 2003 | BAL at SEA | 7-2 | Baltimore Orioles | Regular |
| Jul 8, 2003 | BAL at SEA | 5-6 | Seattle Mariners | Regular |
| Jul 16, 2002 | SEA at BAL | 1-6 | Baltimore Orioles | Regular |
| Jul 15, 2002 | SEA at BAL | 5-6 | Baltimore Orioles | Regular |
| Jun 2, 2002 | SEA at BAL | 11-8 | Seattle Mariners | Regular |
| Jun 1, 2002 | SEA at BAL | 3-4 | Baltimore Orioles | Regular |
| May 31, 2002 | SEA at BAL | 7-8 | Baltimore Orioles | Regular |
| May 30, 2002 | SEA at BAL | 5-4 | Seattle Mariners | Regular |
| May 26, 2002 | BAL at SEA | 1-8 | Seattle Mariners | Regular |
| May 25, 2002 | BAL at SEA | 3-2 | Baltimore Orioles | Regular |
| May 24, 2002 | BAL at SEA | 2-6 | Seattle Mariners | Regular |
| Sep 9, 2001 | BAL at SEA | 0-6 | Seattle Mariners | Regular |
| Sep 8, 2001 | BAL at SEA | 1-6 | Seattle Mariners | Regular |
| Sep 7, 2001 | BAL at SEA | 1-10 | Seattle Mariners | Regular |
| Sep 2, 2001 | SEA at BAL | 1-0 | Seattle Mariners | Regular |
| Sep 1, 2001 | SEA at BAL | 6-4 | Seattle Mariners | Regular |
| Aug 31, 2001 | SEA at BAL | 0-3 | Baltimore Orioles | Regular |
| May 31, 2001 | BAL at SEA | 1-2 | Seattle Mariners | Regular |
| May 30, 2001 | BAL at SEA | 5-12 | Seattle Mariners | Regular |
| May 29, 2001 | BAL at SEA | 2-3 | Seattle Mariners | Regular |
| Sep 17, 2000 | SEA at BAL | 3-2 | Seattle Mariners | Regular |
| Sep 16, 2000 | SEA at BAL | 14-0 | Seattle Mariners | Regular |
| Sep 15, 2000 | SEA at BAL | 10-2 | Seattle Mariners | Regular |
| Jun 25, 2000 | BAL at SEA | 2-4 | Seattle Mariners | Regular |
| Jun 24, 2000 | BAL at SEA | 1-2 | Seattle Mariners | Regular |
| Jun 23, 2000 | BAL at SEA | 3-8 | Seattle Mariners | Regular |
| Jun 22, 2000 | BAL at SEA | 4-11 | Seattle Mariners | Regular |
| May 25, 2000 | SEA at BAL | 1-5 | Baltimore Orioles | Regular |
| May 24, 2000 | SEA at BAL | 3-4 | Baltimore Orioles | Regular |
| May 23, 2000 | SEA at BAL | 2-4 | Baltimore Orioles | Regular |
| Sep 13, 1999 | SEA at BAL | 4-5 | Baltimore Orioles | Regular |
| Sep 13, 1999 | SEA at BAL | 4-5 | Baltimore Orioles | Regular |
| Sep 12, 1999 | SEA at BAL | 1-4 | Baltimore Orioles | Regular |
| Sep 11, 1999 | SEA at BAL | 2-4 | Baltimore Orioles | Regular |
Completed games on file, which start in 1993 — not the clubs’ full all-time series. Regular season 277, postseason 4.