For FiveThirtyEight, I took a look at what has been a brutal season of quarterback injuries in the NFL. Beyond stars such as Aaron Rodgers and Andrew Luck, we've lost an extremely promising rookie (Deshaun Watson), a former No. 1 overall pick who may have been ready to peak (Sam Bradford), and a veteran on his last legs (Carson Palmer). We looked at adjusted games lost for quarterbacks since 2000 and adjusted the numbers by passing DVOA to get a sense of the quality of quarterbacks lost to injury. 2017 hasn't been the worst season on record, but it's sure getting there, and hopefully we won't have to add much to the injury database the rest of the year.