Based on what I see from scanning the, evidence is scanty and unreliable but strong enough to make a sensation. A source used by Wikipedia is , edited by Carroll L. Riley, J. Charles Kelley, Campbell W. Pennington, Robert L. Rands, 1971.
Much more recently, a year ago on Dec 22, 2015 the UK’spublished an article on the discovery of Roman items off the shores of Nova Scotia, Canada. I suspect that is the incident from which your question originates. I quote:
Mainstream history states Columbus was the first non-indigenous person to arrive in the continent when he landed in the Bahamas in 1492.
However, over the years several radical theories have emerged that the Vikings, the Polynesians and the Chinese, arrived before Columbus.
[Lead historian Jovan Hutton] Pulitzer added: “We have absolutely been lead to believe that nothing happened on this side of the pond before Christopher Columbus.
“I think anything that challenges history is very risky, very dangerous and extremely political.
“I think we should all fight for the truth and people should make up their own minds.”
He is not confirming or denying that the Roman sword and military whistle were deposited there by ancient shipwreck two thousand years ago. As we all know, it could be stolen property from a museum discarded as the Coast Guard was boarding the bandit’s ship.