Wikipedia says -

"Tradition credits Gunnbjörn Ulfsson (also known as Gunnbjörn Ulf-Krakuson) with the first sighting of the land-mass. Nearly a century before Eric, strong winds had driven Gunnbjörn towards a land he called "Gunnbjarnarsker" ("Gunnbjörn's skerries"). But the accidental nature of Gunnbjörn's discovery has led to his neglect in the history of Greenland. After Gunnbjörn, Snaebjörn Galti had also visited Greenland. According to records from the time, Galti headed the first Norse attempt to colonize Greenland, which ended in disaster. Erik the Red was the first permanent European settler."

Next time, try the internet...