The Dallas Cowboys have already accomplished two of their primary goals in free agency, upgrading their secondary and getting a veteran backup quarterback.
Within hours after free agency began Tuesday afternoon, team officials visited with Carr at Cowboys Stadium.
The 39-year-old Kitna appeared in only three games last year after starting the final 10 games in 2010 when Romo broke his collarbone.
Orton has started 69 of his 71 NFL games over six seasons with Chicago (2005-08), Denver (2010-11) and the Chiefs. He has completed 1,284 of 2,204 passes (58 percent) for 14,532 yards with 80 touchdowns and 57 interceptions.
The 6-foot-4, 308-pound Bernadeau has started 20 games and played in 47 over the past four seasons for the Panthers at guard. However, after starting 12 games in 2010 he was replaced in the starting lineup at right guard and started only one game last season.
Bernadeau is entering his fifth season in the league out of Bentley College
"They brought him in to be a starting guard," said his agent, Dennis Boyev. "He's really thankful for his time in Carolina. It's a team that took a chance on a kid who came from a Division II college, so he's grateful for that."
Vickers has played in 90 games (38 starts) the past six seasons. He spent five years in Cleveland after being a sixth-round pick in 2006 and played in 14 games last season for the Houston Texans.
AP Sports Writer Steve Reed in Charlotte, N.C., contributed to this report.