Who was the first European in America to see the Pacific Ocean?

Vasco Nuñez de Balboa looked at the Pacific Ocean as an European for the first time in the early 16th Century, after crossing the Panama strait. He dubbed the ocean as the "South Sea" until Magellan proved it was as big as the Atlantic Ocean.

Magellan was also the one who called the Pacific Sea as "Pacific", since after crossing the treacherous currents in the South Atlantic and finding the "Strait of Magellan", he found a much peaceful ocean.

I think it's Balboa atop the Darrien peak.

Manuel de la Puta, a scout for the Spanish expedition who's first words upon seeing the Pacific were, "Holy Shit !! Ain't no on gonna believe dis !!!"