The Grand Slam Side Mission in Far Cry 5 has you searching down Baseball Cards. This guide will tell you Where To Find All 9 Baseball Cards In Far Cry 5 so you can track them down, hand them in and complete the side mission.
Unlike collecting the 12 Vietnam Lighters, this Side Mission is a little simpler. Once you have the Grand Slam Side Mission head to any merchant and check the items tab. If you scroll down to the very bottom you will be able to purchase a special map that highlights the locations of every Baseball Card in Far Cry 5.
This is where the mission is different. It actually highlights the entire collection on your map. Making it much easier to track them down. If you want to save some cash on the map you can use the image below is a basic reference for each of the Baseball Card locations.