If USC beats UCLA, it will be the fourth year in a row that they will finish a regular season ranked No. 1 or No. 2 in the AP Poll. Prior to the current streak, they had not finished a regular season ranked that high since 1972 (1).
In fact, since the AP rankings started in 1936, they finished the regular season ranked No. 1 or No. 2 only four times, before their current streak: 1962 (1), 1967 (1), 1968 (2), and 1972 (1).
To put another way, from 1936 through 2002, SC finished the regular season ranked 1 or 2 four times; if SC wins Saturday, they will have doubled the number of all-time end-of-regular season rankings in the AP top two for the school, from 2003 through 2006.