There are sources from the Bengals saying Mims will be Bengals' #33 pick if he falls to R2. Those are not to be underestimated because the same sources were saying Mixon won't fall past the Bengals in R2, too...
So yeah... even if he falls in the 2nd round, he very well still might not get to us at 34.
Let me show you the numbers for the first 8 games last season.
average yds per game- 198.75
Yds rushing- 106 1 TD
He then got injured in game 9