A genetic study shows Easter Islanders have 8% American Indian ancestry and the DNA was picked up in the AD1300-1500 period before the Spanish and English got their licks or dicks in. (The genomic tally also shows 16% of European origin.) Easter Island was reached about AD 1200 and it is easy to imagine some settlers continuing on to find America because if they explored to the east, they couldn't miss. A few must have made it back.
Reported in Science Daily News.
Something else interesting about the 900 statues they built: Most of the carved statue is sunk below grade.
To be fair, the first reported European on Easter island is neither Spanish nor English. In 1722 Dutchman, Jacob Roggeveen, landed there.