Im pretty sure its mathematecally impossible for tiebreaker no. 4 to ever be used.
Tie Breaker Procedures
For a two-team tie: 1. head-to-head; 2. division record (10 games); 3. record vs. No. 1 team in division proceeding through the No. 6 team if necessary; 4. non-division record (6 games); 5. record vs. No. 1 team in the opposite division proceeding through the No. 6 team if necessary; 6. coin flip by the Commissioner.
For a three-team tie: 1. Total won-lost record of games played among the tied teams (Example: Team A is 3-1, Team B is 2-2 and Team C is 1-3 - - Team A would be seeded highest, Team B second-highest and Team C lowest of the three); 2. division record (10 games); 3. record vs. No. 1 team in division proceeding through the No. 6 team if necessary; 4. non-division record (6 games); 5. record vs. No. 1 team in the opposite division proceeding through the No. 6 team if necessary; 6. coin flip by the Commissioner.