This is from 2020 on the Big Ten website; it's as hard as I'm willing to work.
The championship game participant and division champion from each division will be determined by the following:
- With all conference games completed, the best winning percentage in all conference games.
- In the event of an unbalanced schedule due to cancellation of games: (I didn't include these bullets here, which rarely apply in a non-COVID year.)
The following procedure will determine the championship game participant and/or division champion from each division, along with all other Big Ten Champions Week matchups,
in the event of a tie per above language:
A. If two teams are tied per above language, steps 1 through 8 will be followed until a determination is made:
1. The winner of the game between the two tied teams shall be the representative. If the game was cancelled between the two teams, move to next step in tiebreaker.
2. The records of the two tied teams will be compared based on winning percentage within their division:
(a) In the event of an unbalanced schedule:
i. If two teams have the same number of division losses but a different number of division wins, move to next step in tiebreaker.
ii. If two teams have a different number of division losses, the teams will be compared based on winning percentage within their division.
3. The records of the two tied teams will be compared based on winning percentage against the next highest placed teams in their division in order of finish (3, 4, 5, 6, and 7):
(a) When arriving at a group of tied teams while comparing records, use each team’s record based on winning percentage against the collective tied teams as a group, rather than record against the individual teams
(b) In the event of an unbalanced schedule:
i. If one or both teams did not play a certain team, move to the next highest placed teams in their division in order of finish.
ii. If one or both teams did not play all teams in the group of tied teams, move to the next highest placed team or teams in their division in order of finish.
iii. If one or both teams did not play the lowest placed team in their division, move to next step in tiebreaker.
4. The records of the two tied teams will be compared based on winning percentage against all common conference opponents.
5. The records of the two tied teams will be compared based on the best cumulative conference winning percentage of non-divisional opponents:
(a) Example: East 1 non-divisional opponents are 20-7, East 2 non-divisional opponents are 19-8 – East 1 would be the representative.
(b) In the event of an unbalanced schedule, the records of the two tied teams will be compared based on the best cumulative conference winning percentage of non-divisional opponents, regardless of how many nondivisional opponents each team played. If one or both teams played no non-divisional opponents, move to next step in tiebreaker.
6. The records of the two tied teams will be compared based on winning percentage against the highest placed non-divisional teams in their division order of finish (1, 2, 3, 4, 5, 6 and 7):
(a) When arriving at a group of tied teams while comparing records, use each team’s record based on winning percentage against the collective tied teams as a group, rather than record against the individual teams.
(b) When comparing records against a single team or a group of teams, the record will prevail, even if the number of games played against the team or group are unequal (i.e. 1-0 is better than 0-0, 2-0 is better than 1-0, etc.).
7. The team with the best overall winning percentage [excluding exempted games] shall be the representative, regardless of number of games played. 8. The representative will be chosen by random draw.
The official athletics website for Big Ten Conference
bigten.org