FORT MYERS, Fla. -- Red Sox reliever Tyler Thornburg's surgically removed rib from surgery to treat thoracic outlet syndrome in his right shoulder last June is on display in his parents' home.

Thornburg and his mom sent MassLive.com photos of the rib and how it is displayed on a shelf.

The rib up close:

Thornburg will throw his first real bullpen tomorrow after throwing 10 pitches off the mound Sunday.

"The amount of bullpens aren't really set right now," Thornburg told MassLive.com. "It's just a matter of when I feel comfortable. So I'm trying to progress quickly. I'm trying to progress smart. We're trying to get in the normal things, like six to eight bullpens. So once we start throwing more of them, we'll actually know how many I'll need, too. And then we'll go into live BPs and then games. So we're just going to treat it like a normal spring training progression. Just trying to be smart with it."

He's not ruling out being on the Opening Day roster.

"I could," Thornburg said. "I think a lot of it depends on we don't really know how my arm's going to bounce back after bullpens or live BPs and games and how quickly it's going to recover. So it could be better. It could be worse. I really don't know yet. As well as probably how I look in however many outings I get in. ... Or do they want to wait until I can definitely throw a definite back-to-back (days)."