Miller is a 6'2, 255 former defensive end out of UCF, but was told by the 49ers that he'd be converted to fullback this season. He played tight end in high school and the 49ers worked him out as a fullback pre-draft; apparently they liked him enough there to draft him in the 7th round. Miller will be gunning for starting fullback Moran Norris' job, but he'll face competition from recently signed Titans' practice squad FB Jack Corcoran.
Undrafted free agent rookie Konrad Reuland and former 49ers practice squad tight end Colin Cloherty are expected to compete in camp in the H-back role as well, meaning they'll both likely see time at fullback as well. Altogether this means that Miller will have to show that he's fully recovered from the shoulder injury that sidelined him if he hopes to secure a roster spot.