B12 corner can undercut Roberts and Lassiter on a poorly underthrown ball.
I know I've seen Roberts have to make a tackle before on an interception after such a poor throw (pretty sure it was a Jaren toss).
Epps was running his route to the corner. He expects that ball to go to the corner as it's supposed to do. It did not. It's hard for any WR to stop his momentum at that point. Putting any blame for the int on Epps is ridiculous.
It was a terrible throw. All QBs have them from time to time. The key is how often they have them.