Tennessee selected Smith in the third round (No. 100 overall) of the 2017 draft. He has very similar traits to veteran (and teammate) Delanie Walker. In a limited role last season, Smith caught 18 balls for 157 yards and two TDs.
Unless Walker suffers an injury, Smith is likely to be playing second TE fiddle again in 2018.
Smith might well improve his production in 2018, but he has limited fantasy value as long as Walker continues to be effective. Smith has more value in keeper leagues.