John Gabriel (born Jack Monkarsh; May 25, 1931 – June 11, 2021) was an American actor, singer-lyricist, and producer who is best known for his role as Seneca Beaulac on Ryan's Hope (1975–1985, 1988–1989), for which he received an Emmy Award nomination in 1980.

Gabriel was born in Niagara Falls, New York, the youngest of three children of Harry and Rae Monkarsh.

He appeared on stage in two Broadway productions, The Happy Time and the musical Applause,[1] as well as off-Broadway in Fighting International Fat at the Playwrights Horizons.

He portrayed Pedro in the John Wayne movie El Dorado and also composed its title song in collaboration with Nelson Riddle.

From 1973 to 1975, he had a recurring role as WJM-TV sportscaster Andy Rivers on The Mary Tyler Moore Show.