The words in each set have a common connection, something that bonds all three of them in some way, perhaps shared features or maybe it's characteristics...and then again it could be a manifestation of common attributes.
Can you find a Commonality?
= 1. THE ROOKIE - THE GAUNTLET - THE ENFORCER
= 2. ALL STAR INVITATIONAL - PBA NATIONAL - ABC MASTERS
= 3. BATTLE OF QUEENSTOWN - BATTLE OF FRENCHTOWN - BATTLE OF NEW ORLEANS
= 4. BOX - SEA - TEENAGE MUTANT NINJA
= 5. THE MONSTER - PHANTOM OF THE OPERA - LONDON AFTER MIDNIGHT
= 6. SOFTBALL - BASEBALL - VAMPIRE
= 7. PROSTATE - THYROID - ADRENAL
= 8. A DOCTOR - A MAILMAN - DOMINO'S
= 9. TELMA HOPKINS - ANTHONY ORLANDO - JOYCE WILSON
= 10. TELEPHONE - COPPER - BARBED
= 11. NAT TURNER - DRED SCOTT - SALLY HEMINGS
= 12. ELBOW - TEE - COLLAR