Justise Jon Winslow (born March 26, 1996) is an American professional basketball player for the Wisconsin Herd of the NBA G League.

He was the 2013 Gatorade Texas Player of the Year and averaged 27.5 points, 13.6 rebounds, 3.5 assists, 2.1 blocks, and 1.8 steals per game as a senior in 2013–14.

[4] In the NCAA tournament, Winslow averaged 14.3 points and 9.3 rebounds per game en route to a national championship.

[8] He made his debut for the team in their season opener against the Charlotte Hornets on October 28, recording five points and seven rebounds off the bench in a 104–94 win.

[17] On January 5, 2017, Winslow was ruled out for the rest of the season after undergoing surgery to repair a torn labrum in his right shoulder.

[19] In Game 3 of the Heat's first-round playoff series against the Philadelphia 76ers, Winslow scored a season-high 19 points in a 128–108 loss.

[28] On July 21, the Grizzlies announced that Winslow had suffered a hip injury during team practice and would miss the rest of the 2019–20 season.

[30] On February 4, 2022, Winslow was traded, alongside Eric Bledsoe, Keon Johnson, and a 2025 second-round pick, to the Portland Trail Blazers in exchange for Norman Powell and Robert Covington.

[31] On December 21, 2022, during a 101–98 loss to the Oklahoma City Thunder, Winslow exited the game with a left ankle injury.

[32] After the All-Star break, Winslow received a second opinion on his injury and underwent a bone marrow aspirate concentrate procedure in March to address further discomfort in his left ankle.

His father played basketball for the University of Houston from 1983 to 1987, where he was a member of the famed Phi Slama Jama team that included Hakeem Olajuwon and Clyde Drexler, and was selected 28th overall by the Chicago Bulls in the 1987 NBA draft.