the cubs and marlins wore a patch on their jerseys on opening day of the 2018 season. no, the patch was not to mark the start of another baseball season. it was instead to honor the 17 individuals killed at marjory stoneman douglas high school in parkland, florida on february 14.
ian happ hit a home run on the first pitch of the season, and was given this 2018 topps now card as a result.
here's a 2018 topps fire lewis brinson card
the parkland shooting joins columbine, virginia tech, northern illinois university, and sandy hook as school shootings to have generated a memorial patch and/or other means of recognition by major league baseball and its players, and those are just a small sampling of the similar occurrences over the last few years.