The longest anyone has led an NBA race without winning it: the Cleveland Cavaliers ended 152 of the 2016-17 East race's 161 playing days in first place, 94% of them, and finished behind the Boston Celtics. The longest unbroken spell of that lead ran 145 days. At the other end, the Minnesota Timberwolves won the 2003-04 West race having led on twelve of its 164 playing days, never more than seven 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 NBA races and Biggest NBA comebacks and collapses.
| Rank | Race | Team that led | Days in first | Playing days | Share | Eventual winner |
|---|---|---|---|---|---|---|
| 1 | 2016-17 East | Cleveland Cavaliers | 152 | 161 | 94% | Boston Celtics |
| 2 | 2014-15 Southwest | Memphis Grizzlies | 129 | 149 | 87% | Houston Rockets |
| 3 | 1947-48 East | New York Knicks | 80 | 93 | 86% | Philadelphia Warriors |
| 4 | 2011-12 West | Oklahoma City Thunder | 103 | 120 | 86% | San Antonio Spurs |
| 5 | 1987-88 Midwest | Dallas Mavericks | 115 | 149 | 77% | Denver Nuggets |
| 6 | 1989-90 Midwest | Utah Jazz | 114 | 149 | 77% | San Antonio Spurs |
| 7 | 2017-18 Southeast | Washington Wizards | 114 | 153 | 75% | Miami Heat |
| 8 | 2010-11 East | Boston Celtics | 119 | 161 | 74% | Chicago Bulls |
| 9 | 2021-22 Central | Chicago Bulls | 115 | 156 | 74% | Milwaukee Bucks |
| 10 | 2011-12 Atlantic | Philadelphia 76ers | 77 | 105 | 73% | Boston Celtics |
| Rank | Race | Winner | Days in first | Playing days | Share | First place for good |
|---|---|---|---|---|---|---|
| 1 | 2003-04 West | Minnesota Timberwolves | 12 | 164 | 7% | April 8, 2004 |
| 2 | 2016-17 East | Boston Celtics | 12 | 161 | 7% | April 10, 2017 |
| 3 | 2000-01 Pacific | Los Angeles Lakers | 12 | 158 | 8% | April 17, 2001 |
| 4 | 2011-12 West | San Antonio Spurs | 14 | 120 | 12% | April 16, 2012 |
| 5 | 1997-98 West | Utah Jazz | 21 | 164 | 13% | April 6, 1998 |
| 6 | 2006-07 Southeast | Miami Heat | 19 | 144 | 13% | April 3, 2007 |
| 7 | 1994-95 West | San Antonio Spurs | 28 | 162 | 17% | March 29, 1995 |
| 8 | 2007-08 West | Los Angeles Lakers | 28 | 162 | 17% | April 13, 2008 |
| 9 | 2010-11 East | Chicago Bulls | 29 | 161 | 18% | March 22, 2011 |
| 10 | 2018-19 Southeast | Orlando Magic | 28 | 150 | 19% | April 3, 2019 |
Everything on this page comes from the same day-by-day season files the charts draw, with standings read as each day ended. All 429 charted NBA races from 80 finished seasons enter: every division and conference race from 1946-47 to 2025-26. Wild card races are not ranked; their story is the playoff cutoff, not first place. 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.