The Seattle Seahawks lead the NFL in suspensions for performance enhancing drugs since Pete Carroll became head coach in 2010.
Bruce Irvin became the fifth member of the Seahawks to receive a suspension on Friday.
The total does not include the overturned four-game ban for Richard Sherman at the end of last season.
The Denver Broncos and New York Giants have received four suspensions apiece.
The San Francisco 49ers are amongst 10 teams to have zero suspensions.
Via Mike Sando/ESPN