Potter only played Burn 13 times from the start of the season until the end of Jan. This may suggest that Potter was not as keen on him as you are.
I think you want to have a look at this..... he was injured for 6 games. And was involved in all but 4 games he was available for. So he played 13 times, didn't play 4 times. Sounds like he was quite 'keen'