46 percent of parents with a child would discourage football - up 9 points since 2014.
Overall, 49 percent of Americans disagree, saying they wouldn't encourage a child to play another sport due to concerns about concussions.
A Gallup survey released in the midst of the league-wide national anthem demonstrations in October showed that the NFL's popularity had dropped 10 percent from 2012, when two-thirds of USA adults said they identified themselves as pro football fans.
According to Seton Hall Sports Poll, "The national anthem (stand or knell) (sic) remains a matter of interest to the public, with 27% approving a player protest during the playing of the anthem at the start of the Super Bowl and 44% disapproving, with 25% having no opinion".
Brutal abuso sexual a una bebé: "Sus heridas son horribles"
La bebé fue sometida a una operación de tres horas y se encuentra en condición estable. La menor fue encontrada por su madre, en la cama cubierta de sangre.
According to the survey, 49 percent say they follow the National Football League closely, down 9 points since 2014.
The biggest declines in National Football League followers are in groups making up much of Trump's political base, including whites, white men and men without college degrees.
The NBC/WSJ poll was conducted January 13-17 with 900 adults - including almost half reached by cellphone - and has an overall margin of error of plus-minus 3.3 percentage points.
Trump defended patriotism when the national anthem protests swept across the NFL. The poll has a 3.8% margin of error.