After being named the starting running back in the preseason, Richardson has been a disappointment this year. He barely made it on the field Sunday before leaving with a foot injury, via Jim Thomas of the St. Louis Post-Dispatch, which should make fantasy owners sell his stock.
The 23-year-old did not get on the stat sheet in Week 3 against the Dallas Cowboys, and he has failed to make much of an impact in fantasy leagues this season.
He has 98 rushing yards on 30 carries through the first three weeks, which comes to an average of 3.3 yards per attempt. Though he's also added 10 receptions for 78 receiving yards, he has failed to reach the end zone this season, which is discouraging.
Richardson was expected to have a good year with the Rams; unfortunately, he has failed to do much on the field and now must deal with a foot injury.
For fantasy owners, Richardson has very little, if any, trade value at this time. They may be forced to hold onto him and hope that he can come back and be productive. If there is another option at running back or a flex player available in your league, drop Richardson for that player or at the very least keep him firmly on the bench.