USC junior center Marcus Martin has had recent predraft meetings with the San Diego Chargers, Detroit Lions, Buffalo Bills and the Carolina Panthers, according to a league source.
He has also met with the New Orleans Saints and the Philadelphia Eagles and Carolina Panthers.
Martin is a three-year starter who was named first-team All-Pac-12 Conference last season.
He's drawn second-round and third-round grades from draft analysts.
He started his first two seasons at left offensive guard.
In 2011, Martin was a freshman All-American selection.
Growing up Los Angeles, Martin was a highly decorated offensive lineman named the Los Angeles City Offensive Lineman of the Year by the Los Angeles Times.
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Aaron Wilson covers the Ravens for The Baltimore Sun