The 28-year-old Argentine will be given another chance next season - but was he West Ham's worst last term?
The Argentine made just seven appearances in the Premier League and was eventually loaned out to Queens Park Rangers, where a forward severely lacking in fitness contributed equally little.
The blame, of course, could go to Sam Allardyce, with plenty of West Ham fans showing support for Zarate and suggesting he wasn't given enough of a chance at Upton Park - especially in his preferred position.
But the who, how, why and when matters little now as, a whole season on, there was surely no one worse in terms of their success at West Ham after signing in 2014/15.
Nene did little, too, but he was signed for free. The same goes for Diego Poyet, who should still be a player for the future.
Zarate will also be given a chance to prove himself again with the Hammers. But, at 28, the Argentine has far less time to impose himself. And, as far as last campaign goes, it was one of the most underwhelming since Benni McCarthy.