As quickly as the Colts built up momentum for the stretch run, the wind was taken out of their sails.
Linebacker D'Qwell Jackson was hit with a four-game suspension, according to an announcement made by the league on Tuesday. Jackson was found to be in violation of the league's policy on performance enhancing substances and cannot return until Jan. 2, 2017.
The extremely durable veteran, who has not missed a regular-season start since 2009 as a 26-year-old linebacker with the Browns, is a gigantic loss for a Colts defense that has been struggling to find consistency all season long. Jackson logged a pair of tackles in the team's 41-10 win over the Jets on Monday night. He has three passes defensed, two fumble recoveries, a sack and 52 tackles on the season thus far.