• A secondary defender is a teammate who provides help after the primary defender has been beaten by the ball handler.
• A defender is considered beaten when:
  • The offensive player’s head and shoulders get past the primary defender
• Secondary defenders include:
  • Help defenders rotating to stop dribble penetration
  • Players double-teaming a low post player
  • Defenders in outnumbered fast-break situations
• Important applications:
  • Secondary defenders are subject to **restricted-area rules at the NCAA and Pro level**
  • Secondary defenders are subject to **airborne shooter restrictions**
• Special situations:
  • After an offensive rebound, there are no secondary defenders if the rebounder makes an immediate move to the basket
  • In fast-break situations, all defenders are considered secondary defenders
• Being labeled a secondary defender does not prohibit a defender from:
  • Establishing legal guarding position
  • Defending vertically
  • Attempting to block a shot legally