Celebrate one of baseball greatest postseason performers with this Official American League Baseball hand signed by Athletics and New York Yankees legend Reggie Jackson. Known as Mr. October, Jackson was a central figure on Oakland championship clubs before cementing his Yankees legacy with three home runs on three consecutive pitches in the deciding Game 6 of the 1977 World Series. The Hall of Famer won five World Series championships, earned two World Series MVP Awards, and finished his career with 563 home runs. The autograph has been independently authenticated by James Spence Authentication JSA and is accompanied by a JSA Certificate of Authenticity COA.