NFL players still frustrated with roughing-the-passer rule: 'It's really hard to do your job' - The Washington Post
Packers Clay Matthews left frustrated by late roughing passer penalty
Vikings again benefit from roughing-the-passer call on Kirk Cousins – Twin Cities
Focus on roughing the passer giving NFL a black eye
Did the Packers get robbed on that Clay Matthews penalty?
Clay Matthews & Mike McCarthy react to roughing penalty with anger, confusion - Acme Packing Company
Controversial Roughing the Passer From Clay Matthews
Clay Matthews says the NFL is “getting soft” after latest roughing the passer penalty - Article - Bardown
Controversial Clay Matthews Penalty Featured on Sports Illustrated Cover