Most played cards in Goblins:

4 Decks
Goblin Lackey
16 copies - 4 average
Taiga
16 copies - 4 average
Goblin Matron
15 copies - 3.75 average
Goblin Warchief
14 copies - 3.5 average
Goblin Ringleader
14 copies - 3.5 average
Wooded Foothills
14 copies - 3.5 average
Goblin Piledriver
14 copies - 3.5 average
Goblin Recruiter
13 copies - 3.25 average
Food Chain
12 copies - 3 average
Goblin Tinkerer
12 copies - 3 average
Red Elemental Blast
12 copies - 3 average
Gempalm Incinerator
9 copies - 2.25 average
Wasteland
8 copies - 2 average
Elvish Spirit Guide
8 copies - 2 average
Blood Moon
8 copies - 2 average
Bloodstained Mire
6 copies - 1.5 average
Tormod's Crypt
6 copies - 1.5 average
Pyroblast
6 copies - 1.5 average
Siege-Gang Commander
6 copies - 1.5 average
Mogg Fanatic
5 copies - 1.25 average