“Cautionary tales.” Two years ago, Goff and Wentz, the top two picks of the 2016 draft, signed the richest contract extensions in NFL history. Yet just this month, the two were jettisoned before those record extensions had even kicked in, leaving their former teams with record heaps of dead-money blows to their respective cap sheets. This offseason, another former top pick is extension-eligible coming off a banner third season quarterbacking his team to the playoffs. And yet, some are wondering if the Browns should kick the can down the road on a Mayfield extension, largely because Goff and Wentz cratered soon after signing theirs.