He wasn't immediately signed to a contract, though, and isn't expected to be signed.
However, the Ravens are expected to continue to explore the free agent running back market and add depth between now and when they return to practice next week following their bye.
Running back Bernard Scott worked out for the Ravens last week and was impressive enough that he remains a possibility.
Wells was drafted in the first round of the 2009 NFL draft by the Cardinals and has rushed for 2,471 career yards and 24 touchdowns.
The 6-foot-2, 230-pound former Ohio State standout was cut by the Cardinals in March. He tried out for the New York Giants this season but wasn't signed.
The Ravens have struggled to run the football this season as running back Ray Rice has dealt with a strained left hip flexor and the offensive line hasn't created big holes for him to run through.
The health of backup running back Bernard Pierce is another factor. Pierce is dealing with a recurring hamstring injury that has limited him this season, Sunday against the Pittsburgh Steelers and this week in practice.
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