michael jordan and kobe bryant rookie jerseys are set to be auctioned by sotheby's, with combined expected sales reaching $20 million, highlighting the increasing popularity of sports memorabilia.

michael jordan rookie jersey is expected to sell at auction.

kobe bryant rookie jersey is expected to sell at auction.

sotheby's announced the auction of the jerseys.

michael jordan played for the chicago bulls.

kobe bryant played for the los angeles lakers.