The most important second-half storyline for each Top 25 team

As we hit the second half, it's time to start thinking about what teams need to do to make a playoff run or enter the conference championship mix. For some, it's fixing an issue on defense. For others, it's getting a key player back to health.

Here is the key second-half storyline for each Top 25 team:

No. 1 Alabama

Can someone -- anyone -- challenge the top-ranked Tide? Because with all due respect to the teams that came before, they just haven't done it. Not even Texas A&M, which was ranked the No. 22 team and lost by 22 points. But looking ahead, there might be hope. Maybe not against Tennessee, of course, but the first Saturday in November and a road trip to No. 5 LSU. Then there's a home…