Classic Walkoffs is an insert set in 2012 Topps. This 15-card set features some of the most memorable walkoff hits in the history of major league baseball. The set is not serial numbered and was inserted 1:8 packs. It is partially paralleled by a game used set, an autographed set and an autographed game used set. Interestingly, Joe Carter's home run was not included, nor Eddie Mathews' shot in the 1957 World Series. Two other big ones that probably should have been included: Kirk Gibson with one good knee and Kirby Puckett in the 1991 World Series.