"I believe my partner got blocked out and needed help coach"
I don't think I would use this response, or one like it. Maybe in the heat of the moment I would, but I hope not. If I (a) make a call or (b) don't make a call, I most often say something like (a) "That's the way I saw it" or (b) "That's not the way I saw it"
I just think saying your partner got blocked out is open to too much negative interpretation. Sure, your partner could have been blocked out due to no fault of their own...but someone could also easily infer that your partner was blocked out because they weren't where they should have been. (This is an area I'm really working on for myself.
Having good angles and hustling to see the play.) I sure wouldn't want my partner telling a coach they needed to help me because I was blocked out...even if they did because I was.