The best content Mark McGwire letter of all. Originally a letter for a lithograph he did in the 1980's; the top portion was never filled in. Bottom portion thanks you for being a loyal fan. It is beautifully and authentically signed at the bottom. Top portion was filled in recently in almost perfect matching type font: "The high point of my baseball career was my 1998 home run duel with Sammy Sosa of the Chicago Cubs. I hit my 70th home run of the 1998 season on September 27, 1998…This broke the Roger Maris all-time single season home run record that stood for 37 years." Great piece. Mint.