Samuel Roy Hagar, born October 13, 1947 in Monterey, California, better known as Sammy Hagar (The Red Rocker), is an American guitarist, singer and songwriter and former member of the Van Halen band.

Sammy Hagar began his career in the Montrose group, before joining Van Halen in 1985 until 1996. In 2004, he returned to Van Halen for an event tour in the United States. In 2009, he joined the Chickenfoot project, composed of Joe Satriani, Chad Smith and Michael Anthony. Sammy Hagar was the 1984 singer of the supergroup H.S.A.S. with Neal Schon, Kenny Aaronson and Michael Shrieve, the band's name with the initials of the four musicians' last names.

Samuel Roy Hagar (* 13. Oktober 1947 in Salinas, Kalifornien) ist ein US-amerikanischer Sänger, Gitarrist und Songwriter. Er begann seine Karriere 1973 als Sänger der Band Montrose, war von 1985 bis 1996 sowie im Jahr 2004 Sänger bei Van Halen und gründete 2008 die Band Chickenfoot. Wegen seiner Vorliebe für die Farbe Rot erhielt er den Spitznamen „The Red Rocker“.