MLB head-to-head records
The extremes of every MLB series: who strung together the longest streak, who owns a rivalry, which ones never settle and which games were never close. Each row links to the full matchup page. Want to test yourself? Try the MLB rivalry quiz.
Longest winning streaks
The most straight wins one side ever strung together against the other. A tie ends a streak. Top of the list: Providence Grays won 27 straight against Detroit Wolverines, 1883 to 1884.
Longest active streaks
Still going: winning streaks that include the latest meeting of a series both teams are still playing. Longest still going: New York Yankees have won 14 straight over Kansas City Royals, 2024 to 2026.
Most lopsided series
The biggest all-time leads, by winning percentage, among series with plenty of meetings. Most one-sided: Boston Reds (1891) leads Washington Statesmen 18-2, winning 90.0% of 20 meetings.
| # | Series | Record | Win % |
|---|---|---|---|
| 1 | Boston Reds (1891) vs Washington Statesmen | 18-2 | 90.0% |
| 2 | Boston Red Stockings vs Baltimore Canaries | 23-3-1 | 87.0% |
| 3 | New York Giants vs Buffalo Bisons (1890) | 17-3 | 85.0% |
| 4 | Boston Red Stockings vs Brooklyn Atlantics | 27-6-1 | 80.9% |
| 5 | Philadelphia Athletics (1871 to 1876) vs Brooklyn Atlantics | 22-5-1 | 80.4% |
Closest rivalries
Long series where neither side has pulled away: the closest to a 50-50 record. Each team appears once. Closest of all: Chicago Cubs and Chicago White Sox, 82-82 after 164 meetings.
| # | Series | Record | Win % |
|---|---|---|---|
| 1 | Chicago Cubs vs Chicago White Sox | 82-82 | 50.0% |
| 2 | Atlanta Braves vs Baltimore Orioles | 30-30 | 50.0% |
| 3 | Cincinnati Reds vs Detroit Tigers | 27-27 | 50.0% |
| 4 | St. Louis Cardinals vs Minnesota Twins | 26-26 | 50.0% |
| 5 | San Francisco Giants vs Seattle Mariners | 26-26 | 50.0% |
Most lead changes
The series where the all-time lead has changed hands the most times. Los Angeles Dodgers and Cincinnati Reds have traded the lead 38 times.
| # | Series | Lead changes |
|---|---|---|
| 1 | Los Angeles Dodgers vs Cincinnati Reds | 38 |
| 2 | Tampa Bay Rays vs Baltimore Orioles | 25 |
| 3 | Boston Red Sox vs Detroit Tigers | 22 |
| 4 | San Francisco Giants vs Cincinnati Reds | 21 |
| 5 | Los Angeles Angels vs Minnesota Twins | 21 |
Biggest blowouts
The largest winning margins in a single game. Forfeits and vacated results never count. Biggest margin: New York Mutuals beat Chicago White Stockings 38-1 on Jun 18, 1874.
Longest gaps between meetings
The longest stretch two teams went without playing, while both were still playing other opponents. Longest wait: Boston Red Sox and Pittsburgh Pirates went 99 years between meetings, 1903 to 2003.
Records include games through Oct 27, 2026.
Sources
Records are computed from every final game result in the Matchup Index database. About the data.