The move doesn’t come as a surprise given that there was talk all season that Martindale and head coach Brian Daboll weren’t seeing eye-to-eye. Still, it’s a contradiction of what both Martindale and Daboll had said recently: Martindale said last week that he didn’t see any reason he wouldn’t be back, and Daboll said today that he expected Martindale back.
Wink Martindale resigning as Giants defensive coordinator - NBC Sports