He looked decent considering that this was his 1st ever real (non-preseason) game playing OT.
IMO, he was better than Doug Free. Prior to this game Free had 48 NFL starts at OT compared Zero for Parnell.
Parnell only played football in college for 1 year and that was at DE. He has played a few snaps at TE in the past and OT in preseason; however, with regards to real (non-preseason) games, this is his 1st action at OT.
It would be great if Parnell proves to be too good to keep out of the lineup and replaces Free when Tyron Smith returns (i.e. see Austin, Miles and Williams, Roy)