This is Michael Jordan's 1 iron made by Wilson Staff and stamped "MJ" on the head. This 41" (!!) 1 iron is authenticated by Jordan's exclusive memorabilia provider Upper Deck Authenticated, and was provided by Jordan himself to Hunt Auctions in 2010 with a large assortment of Michael Jordan's personal possessions. Jordan gave these possessions, including this 1 iron, to Hunt Auctions when he moved to Florida in 2010. 

Letter of Authenticity from Upper Deck Authenticated (UDA) that states this 1 iron comes from Michael Jordan's Personal Collection