I get that Morris might not have had the opportunity to learn all of the Cs sets, but why hasn't he been able to stay in shape? It's not like he's been locked up in a jail cell all summer. Not that I want it to really be 'sore knees', but at least that isn't effort related.
And are we all sure Tatum wouldn't have started anyway? Ainge and Stevens seem much more excited about him than Brown last year. Maybe he really is the player they have always wanted.