Teams like Ohio State and Michigan have been flawless through six games. Or at least that’s how it seems.

But Pro Football Focus did a little bit of digging and brought out the biggest weakness for each college team ranked in the top 10. The list included Ohio State, Michigan and Nebraska.

It appears PFF has discovered a common trend in the B1G, knocking all three teams for their quarterback play/passing attack.

On Ohio State:

While QB J.T. Barrett is coming off one of his best games as a passer against Wisconsin, he’s also one week removed from a 9-for-21, 93-yard effort against Indiana. Barrett has been outstanding as a runner and he brings a dynamic threat to the Ohio State offense both in the designed running game and as a scrambler. However, he’s still inconsistent as a passer and despite his impressive passing stats, he’s as much a product of the downfield ability of WR Noah Brown and after-the-catch skills of RB/WR hybrids Curtis Samuel and Dontre Wilson.

Michigan didn’t receive much praise at quarterback, either:

Wilton Speight won the heated battle in training camp, but the position still remains the biggest weakness on the team and perhaps a hurdle they’ll have to clear along the way in order to keep their undefeated season intact. Look no further than the Wisconsin game to see Speight struggle against a good team as he threw a number of dangerous passes into coverage.

And to round it out, Nebraska took some of the same criticism:

Despite his experience, QB Tommy Armstrong still experiences far too many ups and downs as a passer. Look no further than last week against Illinois as he finished with a 41.5 grade for the game and now sits at 63.0 for the season.

So far, the struggles at quarterback haven’t resulted in any losses. All three teams are 6-0 and in contention for a B1G title midway through the season.

We’ll see if any of the upcoming opponents for the three squads takes these weaknesses into account and pull off an upset.