Most played cards in U/R Control:

2 Decks
Rune Snag
8 copies - 4 average
Repeal
8 copies - 4 average
Shivan Reef
8 copies - 4 average
Steam Vents
8 copies - 4 average
Char
8 copies - 4 average
Blood Knight
8 copies - 4 average
Sulfur Elemental
8 copies - 4 average
Remand
8 copies - 4 average
Rift Bolt
8 copies - 4 average
Incinerate
8 copies - 4 average
Psionic Blast
8 copies - 4 average
Epochrasite
8 copies - 4 average
Electrolyze
7 copies - 3.5 average
Venser, Shaper Savant
6 copies - 3 average
Delay
4 copies - 2 average
Ghitu Encampment
4 copies - 2 average
Faerie Conclave
4 copies - 2 average
Pongify
3 copies - 1.5 average
Manabarbs
3 copies - 1.5 average
Ghost Quarter
3 copies - 1.5 average