Since returning from a knee injury in Week 4, Buccaneers running back Doug Martin has yet to rush for even 50 yards in a game, and the two teams he's faced aren't as tough against the run as his Week 6 opponent. The Ravens rank eighth against the run, allowing 91.4 yards per game, and have given up the seventh-fewest Fantasy points per game to running backs.
The Buccaneers gave Martin a vote of confidence earlier this week, with temporary offensive coordinator Marcus Arroyo telling ESPN that the running back's struggles begin with the coaching staff. But as well as Bobby Rainey performed in Martin's absence, a change isn't outside the realm of possibility.
So it's a not so great matchup and a not so great situation for what may well be a not so great running back. I wouldn't start Martin in Fantasy unless I had to.