Ravens head coach John Harbaugh has confirmed that Smith tore his Achilles tendon during their 44-20 win over the Detroit Lions this past Sunday and he has been ruled out for the remainder of the season.
He has been dealing with an Achilles injury for most of the season and rested it by practicing only once or twice a week.
According to Schefter, Smith chose to drop his appeal of his suspension after tearing his Achilles' tendon in the second quarter of Sunday's win.
Smith is the Ravens' third player to test positive for a banned substance this season. While he has technically only made one start in 12 games, he has recorded 25 tackles with two interceptions and eight passes defensed, the takeaways coming over the span of the previous three games.
Injuries have consistently hampered Smith's career. His base salary next year is $9 million according to Over the Cap, so he would stand to lose far more per game-more than 10 times more-than if he were to serve it now.
Rookie Marlon Humphrey replaced Smith on Sunday and is expected to take over the starting role. Smith will miss a total of 17 games over the past four seasons.
The loss of Smith is a big hit to the Ravens (7-5), who control their playoff fate heading into the final four weeks of the regular season.