David Dahl Autographed/Signed Colorado Rockies Ticket Stub 1st HR JSA 16878 This is a ticket stub from the Colorado Rockies vs Baltimore Orioles July 27, 2016 game, David Dahl's first Major League Baseball home run, in which was personally autographed by David Dahl. This includes a certificate of authenticity from James Spence Authentication (JSA) and Denver Autographs.