The Knicks selecting Duke’s RJ Barrett at No. 3 may not be the no-brainer everyone thought, according to NBA GMs.

The annual GM Survey is out, and Cavaliers point guard Darius Garland beat out Barrett for third place in the projected Rookie of the Year vote. Barrett, who has struggled with his outside shot but overall has played well during the preseason, didn’t receive a vote.

No. 1 pick Zion Williamson, who visits the Garden on Friday with the Pelicans, was first at 68%, followed by No. 2 pick Ja Morant of the Grizzlies at 29%. Garland was at 4%, and no other rookie received a vote.

Barrett also didn’t receive a vote in response to the question, “Which rookie will be the best player in five years?” Five other rookies did: Williamson, Morant and the Hawks’ Cam Reddish, who shot 4-of-9 in a preseason game Wednesday at the Garden compared to former Duke teammate Barrett’s 4-of-14, comprised the top three. The Timberwolves’ Jarrett Culver and Garland also received votes.

The Knicks were intrigued enough by Garland, the former Vanderbilt point guard, to invite him for a workout the day before the draft. According to a source, some members of the Knicks organization thought it best to trade down for Garland, who was picked fifth by Cleveland. Garland was injured for most of his freshman year.

Marcus Morris decommitting from the Spurs to sign with the Knicks wound up in the “also receiving votes” category for “Most surprising move of the offseason.” The Knicks open the regular season in San Antonio on Wednesday.

The Knicks were largely ignored in other categories. They finished eighth in “most improved team,” gaining 4% of the vote. Julius Randle received votes for “player is most likely to have a breakout season.” David Fizdale didn’t receive any votes in the various coaching categories. But assistant Keith Smart received votes for best assistant.

The Nets were projected to finish fourth in the Eastern Conference, according to the poll. The Clippers were the top choice to win the NBA title (46%), and Giannis Antetokounmpo (52%) was the favorite for MVP.