This was much less a stumble by Roschon than it was a blocking mistake by the LG/C combo. Jenkins waves the C by him instead of blocking the guy right in front of him and tries to get further down field for another block. If he actually blocks that guy and lets the C run, that play is probably 25 yards or longer.
The 2 consecutive runs to get to the 7 and then down to the 2 by Swift, the 2nd play was exactly the same, but the C blocks right (instead of left like he had on the previous play) where the RG and RT already had things under control and Swift gets tripped up in the hole by the unblocked player. They're getting push but there are still a ton of mental errors that are costing them yards that won't fly against good teams.