There was a piece on ESPNU last night that went into the match-ups. During one segment they focused on Jalen as a passer. They broke down his completion percentages in areas of the field, left to right, behind the LOS, within 10 yards of the LOS, 10-20 yards beyond the LOS and then further than 20 yards beyond the LOS.
We saw on the chart exactly what we expected to see. Jalen is an excellent passer out to 10 yards past the LOS. Deeper than that and he is a 30%-35% completion QB. He is really poor to both sidelines more than 10 yards downfield.
Their take - when he makes quick reads and gets the ball out, he is a very good QB. When he has to read defenses further down the field, he struggles. With under/over coverages, reading defenses is a lot harder. The short routes only require you to read a single defender. The longer routes require you to read multiple defenders for each route.