By ROB MAADDI The Super Bowl champion Seattle Seahawks found their starting quarterback in free agency last year, landing Sam Darnold. The New England Patriots went from worst to first in the AFC East after signing several key veterans who helped them reach the Super Bowl. Winning free agency doesn’t always translate into success on the field. Plenty of moves have backfired over the years. Kirk Cousins ($100 million guaranteed) and Christian Wilkins ($82.75 million guaranteed) are among several big contracts that didn’t work out. But the Seahawks and Patriots proved smart spending can make all the difference. NFL teams...
