The most successful active team captain in professional sports anywhere on Earth is Sue Bird, a 37-year-old point guard for the WNBA’s Seattle Storm.To understand why, it helps to study her nose. Or more specifically, why it keeps getting broken. On Sunday, during Game 4 of the WNBA’s Western Conference Finals, Ms. Bird left the court in the second half with a bloody towel pressed to her face. That’s not entirely surprising-basketball is a contact sport. What made this particular nasal fracture noteworthy was that it wasn’t the first or second of her career. It was the fifth.