The former fifth-round pick out of Wisconsin is likely to draw interest on the free-agent market, and NFL.com's Gregg Rosenthal speculated that Wagner could get an offer upward of $10 million annually. Jason La Canfora of CBS Sports reported two weeks ago that Wagner turned down Baltimore's initial proposal, but didn't provide any details on what the Ravens offered.

Harbaugh did say that the franchise tag, which would be $15.4 million if applied to Wagner, is not an option.

"We're very competitive with what we're offering them," Harbaugh said. "Those guys do what they need to do in terms of their due diligence and checking out what their market value is going to be."

The Ravens don't have a clear replacement if Wagner were to leave. Some potential internal candidates to step into the right tackle spot are Alex Lewis, James Hurst, De'Ondre Wesley or Stephane Nembot.

Improving the offensive line is a big priority this offseason, and trying to keep Wagner is part of those efforts.