Robert Marvin Moerschell (born November 18, 1962) is a former American football player.
He started as quarterback for the Texas Longhorns for most of the 1983 season, the last undefeated regular season for Texas in the 20th century.
In 1984, he moved to tailback and punt returner when Todd Dodge took over as quarterback.
He also returned punts and kickoffs in 1981 and 1982.
Moerschell is the last Texas quarterback to go undefeated as a starter over his entire career and one of the school's top ten punt returners of all time.