Quarterbacks coach Marty Mornhinweg will take over the job.
Trestman was hired by Ravens head coach John Harbaugh in 2015, after two seasons as head coach of the Chicago Bears, where Trestman went a combined 13-19.
Through five games this season, the Ravens have yet to crack 30 points. They were shut out in the second half of a 16-10 loss to the Washington Redskins on Sunday, dropping to 3-2 after a 3-0 start.
Questions about the offense abounded after Sunday's loss, including why starting running back Terrance West - who finished with 95 yards rushing - carried the ball just 11 times in the game.
Trestman has a reputation as a "quarterback whisperer," but it's fair to question whether its deserved. No Ravens completion went for more than 15 yards Sunday and Joe Flacco called his team's performance "embarrassing."
Copyright © 2016 Score Media Ventures Inc. All rights reserved. Certain content reproduced under license.