I get what you’re saying, but there won’t a true “FB” position label on the roster (although guys may line up as such). As
@JMick said, you’ll see TE/H-back. And per HCRE....
“I want to have four quarterbacks, which we do,” Edsall said. “I want to have five running backs, which we’ll probably only have four this year, so we’ll be down one there. Receivers, we want eleven on scholarship and we are going to have eleven. The tight ends/H-backs, I’d like to have five, but we are only going to have four because I can’t get the extra number. Offensive line, we will have sixteen, including signing two more freshmen.”