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Matt Cain & Sergio Romo ADD Autographs on 2010 World Series on Game 2

Mel Allen, Ben Chapman, & Jimmie Reese Autographed Babe Ruth USPS Stamp First Day of Issue Gateway Stamp Envelope

Mel Stottlemyre Autographed Yankee Stadium Legendary Playing Fields First Day of Issue Gateway Stamp Envelope

Michael Brantley MLB Authenticated Autograph 2014 All Star Game Gateway Stamp Commemorative Cachet Envelope

Miguel Cabrera Autographed .300/500 HR/3000 Hits Gateway Stamp Commemorative Cachet Envelope

Miguel Cabrera Autographed 3,000 Hits Gateway Stamp Envelope

Miguel Cabrera Autographed 500 Home Runs Gateway Stamp Envelope

Miguel Cabrera Autographs on Gateway Stamp Commemorative Cachet Envelopes

Miguel Cabrera DINGED Autographed 3,000 Hits Gateway Stamp Envelope

Miguel Cabrera Triple Crown Autographed Gateway Stamp Cachet Commemorative Envelope

Mike Matheny Autographed 252 Game Errorless Streak Gateway Stamp Cachet Envelope - St. Louis Cardinals

Mike Piazza Autographed 2000 World Series Game 2 Gateway Stamp Cachet Envelope

Mike Piazza Un-Signed Hall Of Fame Gateway Stamp Cachet Envelope

Mike Schmidt Autographed 400 Home Runs Gateway Stamp Envelope

Mike Schmidt Autographed 500 Home Runs Gateway Stamp Envelope

Mike Schmidt Autographed Hall Of Fame Gateway Stamp Envelope

Mike Scott Autographed No Hitter - Houston Astros

Mike Shannon Autographed 25th Anniversary of Busch Stadium Gateway Stamp Envelope - St. Louis Cardinals

Mike Trout MLB Authenticated Autograph 2014 All Star MVP Gateway Stamp Commemorative Cachet Envelope

Mike Witt Autographed Perfect Game - California Angels

Minnie Minoso Autographed Comiskey Park Legendary Playing Fields Gateway Stamp Envelope - Chicago White Sox

Monte Irvin - 50th Anniversary of Baseball's Hall Of Fame

Muhammad Ali Autographed + JSA Letter Olympic 30th Anniversary Gateway Stamp Cachet - Rome Italy

Nate 'Tiny' Archibald Autographed Basketball 100 Years First Day Cover Gateway Stamp Envelope w/ FDI Postmark