Callaway led the Vols in receiving in 2018, averaging 16 yards per catch en route to gaining 592 yards through the air. He managed just two touchdowns, though, a disappointing figure when factoring in that he scored five times in 2017. Shoddy quarterback play certainly played a role, as Jarrett Guarantano tossed just 12 touchdowns in 12 games last season. Guarantano returns in 2019, which is a double-edged sword for Callaway. On the plus side, Callaway led the team in receiving with Guarantano under center, and they have a rapport together. On the downside, Guarantano's upside is limited, and as a result Callaway's production may not have much more room for upward growth.