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But fly-half Weir and centre Dunbar both starred for Glasgow Warriors in their 14-6 victory over Scarlets on Saturday - exacting some revenge for their reversal in international colours.
And Townsend, head coach of the Warriors, was full of praise for his two stars.
"When you have a defeat (Scotland against Wales) you just want to play as soon as possible," he said.
"We had to balance that need for them with their physical and mental state.
"The RBS 6 Nations is a huge tournament that requires a lot of effort but I thought Duncan and Alex both played really well and showed confidence from playing in those games."