Chances are most Doug Martin owners didn't really miss him with the Buccaneers on bye in Week 7. He has yet to rush for more than 45 yards in the four games he's played this season, and he's scored just one touchdown.
But for better or worse, he remains the Buccaneers' go-to running back, and that role keeps him relevant enough in Fantasy that you shouldn't ignore him when he has a favorable matchup. And he has such a matchup Week 8 against Minnesota.
The Vikings rank 19th against the run, allowing 118.1 yards per game, and have surrendered the sixth-most Fantasy points per game to running backs. Like the Buccaneers, their offense is a work in progress with an inexperienced quarterback at the helm, so they may not force the Buccaneers' into catchup mode so early, allowing Martin to get more than his usual dozen or so carries.
You're probably still not excited about starting Martin this week, but if you don't like your other options for the flex spot, he may be your best choice.