One of the rarest feats in baseball is the perfect game, of which there have only been 20 instances heading into the 2011 season. More than half of the pitchers who have achieved the feat - 11 in total - have autographed this special, NRMT bat from the Cooperstown Bat Company, which only manufactured 15 (this is #2 of 15). Overall, 12 of the 20 perfect games are accounted for here. The signatures are from Jim Bunning, Sandy Koufax, Dennis Martinez, Len Barker, Don Larsen (the only one to throw a perfect game in the postseason), Tom Browning, Mike Warren, David Cone, Kenny Rogers, David Wells and Randy Johnson, who turned the trick twice. Each pitcher but Wells includes the date of his gem(s) under his name, and the signatures average 8/10.