Garner was unable to practice at OTAs while still rehabbing from a torn ACL, Jake Kring-Schreifels of the team's official site reports.
Garner suffered a torn ACL in August of last season, and still seems to be working his way back from that injury. The 27-year-old has played just one regular-season game in his career thus far, and faces a loaded depth chart at tight end in an attempt to secure a roster spot for 2019.