The longest anyone has led an MLB race without winning it: the Texas Rangers ended 173 of the 2012 AL West race's 177 playing days in first place, 98% of them, and finished behind the Oakland Athletics. The longest unbroken spell of that lead ran 171 days. At the other end of the same race, the Oakland Athletics won it having led on three of those 177, never more than two in a row. Both lists below rank by the share of a race's playing days a team spent in first place. How that is counted is spelled out under the tables.
Companion pages: Closest MLB races and Biggest MLB comebacks and collapses.
| Rank | Race | Team that led | Days in first | Playing days | Share | Eventual winner |
|---|---|---|---|---|---|---|
| 1 | 2012 AL West | Texas Rangers | 173 | 177 | 98% | Oakland Athletics |
| 2 | 2025 AL Central | Detroit Tigers | 170 | 178 | 96% | Cleveland Guardians |
| 3 | 2009 AL Central | Detroit Tigers | 157 | 178 | 88% | Minnesota Twins |
| 4 | 1942 NL | Brooklyn Dodgers | 140 | 159 | 88% | St. Louis Cardinals |
| 5 | 1969 NL East | Chicago Cubs | 147 | 169 | 87% | New York Mets |
| 6 | 2007 NL East | New York Mets | 153 | 177 | 86% | Philadelphia Phillies |
| 7 | 2008 NL West | Arizona Diamondbacks | 151 | 179 | 84% | Los Angeles Dodgers |
| 8 | 1951 NL | Brooklyn Dodgers | 133 | 158 | 84% | New York Giants |
| 9 | 1994 NL East | Atlanta Braves | 104 | 126 | 83% | Montreal Expos |
| 10 | 2000 AL West | Seattle Mariners | 145 | 176 | 82% | Oakland Athletics |
| Rank | Race | Winner | Days in first | Playing days | Share | First place for good |
|---|---|---|---|---|---|---|
| 1 | 2012 AL West | Oakland Athletics | 3 | 177 | 2% | October 3, 2012 |
| 2 | 2006 AL Central | Minnesota Twins | 4 | 179 | 2% | October 1, 2006 |
| 3 | 2007 NL East | Philadelphia Phillies | 4 | 177 | 2% | September 30, 2007 |
| 4 | 2009 AL Central | Minnesota Twins | 6 | 178 | 3% | October 6, 2009 |
| 5 | 1964 NL | St. Louis Cardinals | 6 | 171 | 4% | October 4, 1964 |
| 6 | 1951 NL | New York Giants | 6 | 158 | 4% | October 3, 1951 |
| 7 | 1938 NL | Chicago Cubs | 10 | 154 | 6% | September 28, 1938 |
| 8 | 1959 NL | Los Angeles Dodgers | 13 | 166 | 8% | September 28, 1959 |
| 9 | 1934 NL | St. Louis Cardinals | 12 | 150 | 8% | September 29, 1934 |
| 10 | 2025 AL Central | Cleveland Guardians | 16 | 178 | 9% | September 28, 2025 |
Everything on this page comes from the same day-by-day season files the charts draw, with standings read as each day ended. All 428 charted MLB races from 125 finished seasons enter: every pennant and division race from 1901 to 2025. Wild card races are not ranked; their story is the playoff cutoff, not first place. The 2026 season joins these lists when it ends. A team's time in first place is counted once per season, at its longest, whichever of its charted races it came in.
Longest leads lost is the club that ended the most of a race's playing days in first place and did not finish first. Any club in the race qualifies, not the runner-up alone, because a club can lead for four months and finish fifth.
Winners who led least is the same count for the club that did win, ranked from the fewest days up. Its last column is the day the winner took first place for good, which the comebacks page ranks on.
Only days this race's teams played are counted, the same rule the closest races page counts closeness over. A strike or a pause freezes the standings, and a leader sitting out an idle stretch would collect time on top for nothing.
The ranking is by share rather than by the raw count, because a league's seasons are not all the same length and a short one would otherwise win by being short. Seasons cut short by a strike or a stoppage are ranked on what was played, which is the same rule and the reason for it. The count and the total are printed beside the share, so the order can be checked; where two rows print the same whole percent, the unrounded share put them in that order.
A day two clubs end level at the top is a day in first place for both of them, which is what holding first place means in English. So the two counts of one race can add up to more than the race's playing days. Races whose top two the standings cannot separate appear on neither list: with no winner, the data can name neither the club that lost a lead nor the club that kept one.
A lead measured in days and a lead measured in games are different questions, and the two lists often disagree about which season was the bigger collapse; the comebacks page ranks the same blown leads by size. Only finished seasons are ranked; every irregularity in the record is listed in the data notes.