The signed, game-worn jersey from Kobe Bryant's 2007-08 NBA MVP season -- the only year he won the award during his career -- just sold for $5.8 million at an auction!!
Sotheby's tells TMZ Sports ... the Bryant jersey set a new record for Kobe-related sports memorabilia sold at auction, and is the second-most valuable basketball jersey to ever hit the market.
Bryant wore the jersey for 25 games in '07-'08 ... averaging 28.3 points, 6.3 rebounds and 5.4 assists while leading the Lakers to the NBA Finals for the first time since Shaquille O'Neal left.