The league revealed the list (which ended up being 76 players because of a tie) this week for their 75th anniversary ... and the Golden State Warrior sharp shooter didn't make it.
"Maybe I'm just naïve in my ability to play basketball," the 31-year-old said of being off the list on Thursday.
"But in my head, I'm TOP 75 of all time."
Is he naïve, though? Well, let's take a look ...
Thompson is a 3x champ, 5x All Star, holds the record for most points in a quarter, the most 3 pointers made in a game and ties the record for most 3-pointers made in a single playoffs (98) with his teammate Stephen Curry -- who made the list.
Warriors head coach Steve Kerragrees with Thompson ... and feels Draymond Green should be on there too, saying, "I definitely think that both guys are top 75."
"Just based on winning and two-way basketball and everything that really matters more than statistics. What matters is if you’re winning championships, that’s what counts."