Which top 25 teams are leaking oil? Indiana, Ole Miss among 5 squads that enter October showing warts

Getty Images Five weeks into the college football season, a few perceived title contenders are starting to show some cracks. Close wins in conference play can often mask those flaws for a while, but the long haul has a way of exposing them. Look at Louisville — it fought valiantly against Ole Miss in an opening shootout, beat SMU in a top-25 battle and then dropped the ball at home against Wake Forest. Once conference play heats up, there’s no place to hide deficiencies. The concern isn’t the same for every contender. There are a few who need cleaner execution…