Whatever happens with Drew Lock in 2018, his senior year is already something of an anomaly.
Prior to Lock’s decision to return for his senior year, only four draft-eligible Power 5 quarterbacks have returned to their schools after throwing for at least 40 touchdowns. All four of those previous quarterbacks played in the Big 12.
As the chart below shows, Jason White (2003), Graham Harrell (2007), Sam Bradford (2008) and Baker Mayfield (2016) all threw for at least 40 touchdowns as a draft-eligible player and returned to school the following year.
There are some notes to go along with that, however.