All of the I's aren't dotted and the Ts aren't crossed, but it appears that center Dominic Raiola will be back for his 13th season.

Raiola, according to two league sources, has agreed to restructure his contract for 2013. The details were not completely ironed out as of Thursday afternoon and Raiola's agent, Kenny Zuckerman, did not immediately return a phone call or email.

Raiola, who has started the last 11 seasons and is a valuable leader, had a base salary of $4.05 million for 2013. With accrued bonuses, though, his salary cap hit was more than $6 million.

It is a safe bet that Raiola's salary will be cut at least in half.

The Lions are in the process of restructuring the offensive line. Veteran guard Stephen Peterman was released last week, left tackle Jeff Backus is contemplating retirement and right tackle Gosder Cherilus is a free agent.

There was speculation that Raiola might be cut, as well, to make room for younger interior linemen like Bill Nagy and Rodney Austin. Restructuring his contract ensures that Raiola will be at training camp, but for the first time in a decade, he may have a legitimate battle for his starting spot.

Robertson promoted

The Lions officially promoted Marcus Robertson Thursday to replace Tim Walton as the team's secondary coach. Robertson was hired before last season to assist Walton and work primarily with the safeties. Walton is now the defensive coordinator in St. Louis.

From The Detroit News: