Mix the dry rub together in a small bowl. Rub thoroughly over all sides of the pork.
Add minced garlic to the top of the pork and place in a slow cooker.
Drizzle the lime juice over the pork. Add the two containers of mandarin oranges and their juice in a circle around the pork. Add the beer to the circle of orange mixture.
Place bay leaves on top of the pork and cook on low for 8 hours.
Remove bay leaves. Shred pork with two forks.
Set oven to broil on high. Add shredded pork to a rimmed baking sheet and drizzle the juices from the slow cooker on top. Broil for 5 minutes.
Serve in warm tortillas or add on top of your favorite nacho recipe!