Yes, DRAKES is a Scrabble word!

Letter values in Scrabble US: D 2, R 1, A 1, K 5, E 1, S 1.

Is it a valid word?

DRAKES is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

English explorer and admiral who was the first Englishman to circumnavigate the globe and who helped to defeat the Spanish Armada (1540-1596)
adult male of a wild or domestic duck

Also: francis drake, sir francis drake.