When things go sour in the NFL, QBs often are changed

FILE - In this Oct. 28, 2018, file photo, New York Giants quarterback Eli Manning (10) talks with head coach Pat Shurmur during the second quarter of an NFL football game in East Rutherford, N.J. When things go sour, an NFL team's fan base often points to two people: the guy calling plays on the sideline, and the man behind center trying to execute them. (AP Photo/Bill Kostroun, File)

When things go sour, an NFL team’s fan base often points to two people: the guy calling plays on the sideline, and the man behind center trying to execute them.