Could be.
It could also be that the Cats promised him X number of weeks, and with Knight back a little early than anticipated they are still fulfilling their mutual obligations.
If they want him around, it to his benefit to keep training with the Cats, in case somebody else needs a short-term fill-in.
Besides, if Matty keeps banging his head (again) he'll be out with another concussion.
It's no wonder he wears his hair in a fro, but he needs a padded helmet.
I actually thought Walker looked ok in his limited minutes for us. Not gonna win a ring, but not bad for a stop-gap local.