Related Clues:

• The yoke's on them
• Uniformed units
• Sides
• League members
• Some may or may not be in your league
• Joins forces
• Reds and Browns, e.g.
• Lions and tigers and bears
• Play groups
• Heat and Lightning
• Cardinals, Orioles and Blue Jays
• League makeup
• See 28 Across
• Shirts and skins, e.g.
• Devils and Angels, e.g.