– Denver Broncos safety Kareem Jackson has been suspended without pay for four games for repeated violations of player safety rules, the result of his first tackle since he returned from another suspension.

Jackson lowered his helmet and hit Minnesota Vikings quarterback Joshua Dobbs less than two minutes into Sunday’s 21-20 Broncos win.

A 14-year veteran in his fifth season with the Broncos, Jackson was notified of his suspension Monday morning by NFL vice president of football operations Jon Runyan. Runyan said in the letter, “on the play in question, you lowered your head and delivered a forceful blow to the shoulder and head/neck area of an opponent when you had time and space to avoid such contact. You could have made contact with your opponent within the rules, yet you chose not to.”

Dobbs was a running back on the play, as Vikings tight end T.J. Hockenson took the snap from center and pitched the ball to Dobbs, who ended up fumbling.

One of the NFL’s health and safety spotters on site directed Dobbs to undergo a concussion check following the play. Dobbs was cleared and reentered the game for Minnesota’s next offensive series.