It often takes years to figure out if a trade was a bad one.
For instance, the Matt Moore-Matt Duffy trade looks like a wash right now (Duffy couldn't stay healthy, Moore couldn't stay effective), but it'll turn into a dud for the Giants if 22-year-old Lucius Fox ever reaches his potential.
We've had enough time to judge most trades, though, so here's a rundown of 10 that backfired on the Giants:
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