re: If LSU runs the table

If LSU runs the table the worst that could happen is a tie with Auburn for the SEC West. If that happened Auburn would win the tie breaker and represent West in the SECCG. If that happens, then there is zero chance of making the College Football Playoffs.

If LSU wins the SEC West, and the SECCG, it is very likely that they will make the CFP as the SEC champion. Right now the ACC and B1G leaders appear to be shoe-ins for playoff spots. The PAC12 and Big XII leaders look to be on the bubble at best, and Houston needs to run the table to have a shot. The question becomes would a 2 loss SEC champion be more deserving than the champion of the PAC12 or Big XII. My guess is yes given LSU's circumstances and turnabout.

ETA: I forgot about Washington. If they win the PAC12 with one loss then LSU will not make the playoffs.