nationalpost.com
No. 17 USC hosts No. 23 Arizona for Pac-12 South lead
No. 23 Arizona (6-2, 4-1 Pac-12, CFP No. 22) at No. 17 Southern California (7-2, 5-1, CFP No. 17) 10:45 p.m. (ESPN)Line: USC by 7 1/2.Series record: USC leads 32-8.WHAT’S AT STAKEControl of t…