[Dustin]

I don't see any problem with allowing the Knight to electively drop his Basic Speed at the very beginning of a fight (but only at the very beginning). There's a considerable risk that he will cede first action to a faster enemy, so it doesn't seem abusive.

What I wouldn't allow is for him to lurk on the first round to see who goes when, and then 'jump in' when he likes. Simply declare that for this fight, he is using a lower Basic Speed of value X, and determine turn order normally from there.