LeBron James never did it. Neither did Magic Johnson or Larry Bird, or Wilt Chamberlain and Bill Russell. Even Michael Jordan never did it.
But on Tuesday, Stephen Curry did. After a record-breaking season, he became the first player in N.B.A. history to be elected most valuable player by a unanimous vote.
Curry revolutionized the game this season, pouring in a record-shattering 402 3-point shots while leading the Golden State Warriors to an all-time best 73-9 record. He heralded his selection by coming back from injury on Monday night with 40 points including 17 in overtime, in a win against the Trailblazers.
All 131 voters chose him as the M.V.P. Kawhi Leonard of the Spurs placed second and James of the Cavaliers placed third, based on second- and third-place votes.
In 2013, in his third season in Miami, James led the Heat to a 66-16 record. He got 120 votes, but one voter opted for Carmelo Anthony of the Knicks, who had led the league in scoring.
In 2000, O’Neal’s only M.V.P. title came within a whisker of being unanimous. His Lakers were 67-15, and he led the league in scoring. He also took the support of 120 voters, with one opting instead for Allen Iverson.
The only one of Jordan’s five M.V.P.s that was especially close to unanimity came in 1996, when four votes went elsewhere, one each to Hakeem Olajuwon and Karl Malone and two to Anfernee Hardaway.
Last season, when Curry had only 286 3-pointers, he got 100 of 130 votes, with 25 seeing James Harden as more valuable, and five choosing James.
Other sports have varied M.V.P. voting systems, some of which have changed over time, so direct comparisons are a little unfair. Still, 17 baseball players have won unanimous selection, including Bryce Harper last season. Tom Brady was a unanimous pick for The Associated Press’s N.F.L. M.V.P. in 2010.
In 1982, Wayne Gretzky became the N.H.L.’s only unanimous M.V.P., getting all 63 votes. It’s a tougher task now, as more than 150 voters currently cast ballots.
No one has ever unanimously won a Heisman Trophy, which has a large number of voters. In 2014, the highly lauded Marcus Mariota received 788 first-place votes, but wide receiver Amari Cooper of Alabama received 49 and running back Melvin Gordon of Wisconsin 37.