Sermon on the roster bubble?

There's been some positive buzz on 49ers RB Trey Sermon this month, but insider Matt Maiocco believes he's on the roster bubble. "If Sermon were not a third-round pick a year ago, there probably would not be much of a conversation about his status," Maiocco writes. He has RBs Elijah Mitchell, Ty Davis-Price and Jeff Wilson as locks to make the team, with Sermon, JaMycal Hasty and Jordan Mason fighting for the final spot. There's no clear-cut handcuff to Mitchell, but Davis-Price and Wilson are better last-round fliers than Sermon.