Morrison and Barclay led Glasgow out against the reigning champions and both starred in the 35-17 bonus-point win that means the Warriors can now no longer finish outside the top four.
And skipper Kellock insists he wasn't surprised one bit by Morrison and Barclay's efforts as Glasgow recovered from defeat to Scarlets last time out to beat Ospreys on Friday evening.
"I've played rugby with Graeme since I was 18-years-old and I love playing rugby with him because he fills the jersey every single time he puts it on and you saw that out there," Kellock told the Herald Scotland.
"He's not played a lot of rugby in the last few weeks, so to come in and put in a performance like that was outstanding and John's exactly the same; 150 times he's had that jersey and that's what we ask of the boys, that you come off the park feeling as if you've earned the right to wear it.
"We didn't dictate the game last week, Scarlets did that, but I'm glad we can draw a line under that.
"The energy was there, the emotion was there. The chat for the last two days has been about the actions that need to take place on the park, however, this job is not even close to being done, so we'll pat ourselves on the back and then move on."
63x46.png){kind=logo}