Defensive Shell Progression
The following is from Matt McCarty, Head Boys Basketball Coach at Vernon Hills High School:
The following is from Matt McCarty, Head Boys Basketball Coach at Vernon Hills High School:
“Demanding Excellence From Everyone No Selfish Exceptions!”

SHELL PROGRESSION / DEFENSIVE CONCEPTS / TERMINOLOGY
- STRADDLE HELP LINE - Be Boxer Ready (bouncy) and use your wingspan
- SPRINT TO CLOSE with high hands (thumbs together) / Tracing the ball (think deflection)
- – DENY – HELP – SKIP CALLS - BOX = Everyone not only talks but communicates. Finish w/ shot call & box out!
- DEAD BALL PRESSURE - Calling out “Deads”. Offensive players may take one or two dribbles and then pick it up to simulate a dead ball.
- BASIC DEFENSIVE CONCEPTS TO BE PRACTICED DURING SHELL (3v.3 & 4v.4): Defending Face Cuts / Weakside Cuts / Dribble Penetration (no splits) / Baseline Penetration (charge) - Kickout Pass - Close - Boxout - Secure Rebound / Defending Flex Cuts / Defending Ball Screens / Defending Next Opponent Offense / Defending Down Screens & Staggers / Defending Cross Screens
- DISADVANTAGE DRILL: Four Defensive Players vs. Five Offensive Players (2 dribbles allowed)
- TERMINOLOGY TO USE DURING SHELL: Jump & Sprint to the ball, don’t shuffle - Have your back to the baseline - Take the fake with the back foot, don’t lunge forward - Guard a wide area - Use your pointer fingers, find man & ball - Contest jump shooters, but never foul a jump shooter - Tag screens on shooters & run them off the screen - Topside on ball screens for good shooters - Stay home on back screens - “I GOT YOUR BACK” on screens.
- PRINCIPLE REMINDERS DURING SHELL:
- Make them face our set defense - SPRINT BACK! Know our conversion rules.
- Contest every shot. Make them shoot the ball over a close out hand.
- Finish the play with a defensive rebound. They get one chance.
- Constant repositioning, talking, and communicating knowing sometimes we will be in scramble mode.
- Understand the defensive scouting report on our next opponent.
- DEFENSIVE THOUGHT PROCESS DURING SHELL:
- Think containment. Back foot must be on balance.
- Low in your stance. Less chance to be screened.
- Play defense with your feet. Nothing gets to the middle. Make the O play lateral.
- Off the ball line up in gaps.
- Weakside mentality means no ball in the lane.
- See the ball and your man.
- Sprint to help.
- Lead leg should be towards the ball.
- Take away driving angles. Know your opponents strong hand.
- Find the line of the ball and do not be out of position or above it.
- GET THEM TO BUY INTO THE PHILOSOPHY OF…. Five guys guarding the ball at all times. If you coach defense with excitement, then they will play that way.


