Zuttah, 27, is expected to take over at center for Gino Gradkowski. He was Pro Football Focus' 22nd ranked center last season out of 35 qualifiers.
This is what ESPN's Buccaneers reporter Pat Yasinskas had to say about Zuttah: "Zuttah probably never will be a Pro Bowler, but he can be a solid contributor if he's surrounded by a good offensive line. Zuttah's natural position is center, but he's versatile and has played guard in the past."
Stewart, 25, has started 19 games in his four-year career, including six last season. He's only had more than 36 tackles in a season once and has one career interception.
ESPN's Rams reporter Nick Wagoner said Stewart showed promise in 2011 when he was starting and healthy.
"He's rarely had any long-term health issues but is constantly nagged by smaller ones," Wagoner said. "When he is on the field, he's best used in the box where he can blitz and help in run support. He occasionally flashed the ability to deliver the big hit but made few plays in coverage."
But Stewart doesn't fit what the Ravens' need -- an athletic safety whose strength is pass coverage.
"For what it's worth, the Rams also have a desperate need for a rangy, athletic safety and they showed little interest in bringing Stewart back," Wagoner said.