Jalen Green, Cole Anthony, Obi Toppin and Juan Toscano-Anderson are the 2022 NBA Slam Dunk Contest participants, per Stadium's Shams Charania. 

Sources: Houston Rockets rookie Jalen Green will headline the NBA Slam Dunk Contest at All-Star Weekend in Cleveland. Expected participants: pic.twitter.com/5Y7rAmESF8

— Shams Charania (@ShamsCharania) February 1, 2022

Green makes his first appearance in his rookie season as the No. 2 overall pick from last year's NBA Draft. Anthony and Toppin are both second-year players, with Toppin joining the contest for the second time. Toscano-Anderson has risen into the Golden State Warriors' rotation after going undrafted and is in his third season as an NBA player.