"A 19-year-old Jackie Robinson signature, I've never seen one that young. It's truly amazing." The guest revealed that he hadn't had the items appraised before but was aware of their significance ...

MLB players wore No. 42 on their jerseys and hats Monday, and the Reds' Elly De La Cruz commemorated by wearing custom Jordan 4 cleats in Seattle.

But one key piece of baseball history is off the market right now and is instead in the hands of U.S. marshals: the contract signed by Jackie Robinson, breaking baseball’s color barrier.

"Jackie Robinson's impact was greater than just that of baseball. He was a transforming agent and in the face of such hostility and such meanness and violence, he did it with such amazing dignity.