Denver Broncos safety Kareem Jackson was just slapped with a 2-game suspension -- ending his 2019 season -- after cops busted him for DUI back in September.
Jackson -- a 31-year-old stud defender -- was arrested on September 19 in Denver after officials say he was speeding and driving under the influence.
KJ -- a former 1st round pick who was a star at Alabama -- immediately reported the arrest to Broncos officials ... who passed the news on to the NFL.
The league investigated ... and on Tuesday they handed Jackson a 2-game suspension.