Whether that materializes into a visit or a contract remains to be seen, as there's some concern that Knighton's asking price won't match up with the Ravens' budget even after they created $9.8 million in salary-cap space by trading defensive tackle Haloti Ngata to the Detroit Lions and restructuring Terrell Suggs' contract.
Knighton visited the Washington Redskins on Wednesday, according to a source. The Redskins previously signed former Chicago Bears defensive tackle Stephen Paea and former Indianapolis Colts defensive lineman Ricky Jean-Francois.
Knighton has also drawn interest from the Oakland Raiders, New England Patriots and Seattle Seahawks. However, the Raiders signed defensive tackle Dan Williams and dropped out of pursuing Knighton after they were unable to agree on a price. The Broncos are no longer a consideration, according to a source.
The 6-foot-3, 331-pound Knighton was one of the top-ranked run-stopping defensive linemen in the NFL last year and finished with 30 tackles and two sacks.
If the Ravens were able to work something out with Knighton, it would go a long way toward adding some veteran leadership for a defensive line that lost Ngata and also released Chris Canty to save $2.66 million against the salary cap.
"Obviously, we drafted him, Del Rio said. "We thought at that time he was a dancing-bear type. A big powerful man who could stay on his feet. This game is about big powerful men so that guys that have the skill level can do their things.
"We got back together and he played well in Denver. I appreciate that. I respect that. We have to have those kind of people in our trenches on the offensive and defensive line in order to play the kind of football we expect to play."