There have been a lot of posting here suggesting that McKinney is just an average O-lineman. Perhaps he is. I confess I don't watch his play or the play of other centers to offer a fair comment. I believe he did make a noteworthy contribution last night, however. On Hollings big reception on the screen pass to Carr's right, I believe than Weary (RG) made a nice block at the line of scrimmage to spring Hollings and Mckinney was charging way down field to occupy 2 blcokers, allowing Hollings to cut back to the middle for the big gain.
If I'm correct, I think he showed great hustle and commitment to 'finish the play'.