One of LeBron James' very first game-worn NBA jerseys is hitting the auction block ... and the piece of history could fetch more than $630k!!!
Goldin Auctions tells TMZ Sports ... the jersey was worn during King James' 5th and 8th games of his rookie season with the Cleveland Cavaliers ... including his first-ever matchup against his best friend, Dwyane Wade, and Miami Heat on November 12, 2003.
The other game was against the Indiana Pacers, when 18-year-old Bron scored 23 points on November 7.