The 5-player delegation features Sterling Brown -- the former Milwaukee Bucks star who was the victim of a police brutality incident in 2018 when he was tased by cops at a Walgreens.

The other players ... Kyle Korver, Orlando's Jonathan Isaac, Marco Belinelli and Anthony Tolliver.

Both Brown and Korver were members of the Bucks in the NBA Bubble this year when they boycotted a playoff game to protest the shooting of Jacob Blake. Brown is now a member of the Houston Rockets.

23-year-old Jonathan Isaac was one of the only players to stand during the national anthem during their Bubble. He's also an ordained minister.

Unclear exactly what the players and The Pope will talk about -- but it was reportedly Pope Francis who had a rep reach out to the NBA Players Association to get the ball rolling

Pope Francis reportedly "wanted to learn more about how players had recently brought attention to pressing social justice issues and economic inequality -- and what they planned for the future," according to ESPN.

After the meeting -- which took place in the papal library at the Apostolic Palace -- the players were scheduled to get a tour of St. Peter's Square.