In which division do the Miami Marlins play?

In which division do the Seattle Mariners play? Which MLB team's mascot is Mariner Moose? Which MLB team's mascot is Rangers Captain? Which MLB team's mascot is Blooper? Which MLB team's mascot is Billy the Marlin? In which division do the New York Mets play? In which division do the Washington Nationals play? Which MLB team's mascot is Screech?