Mark David Loretta (born August 14, 1971 in Santa Monica, California) is an infielder in Major League Baseball for the Los Angeles Dodgers. Previously, Loretta played with the Milwaukee Brewers (1995-2002), Houston Astros (2002, 2007-2008), San Diego Padres (2003-2005) and Boston Red Sox (2006). He bats and throws right-handed.

Drafted by the Milwaukee Brewers in the seventh round of the 1993 Major League Baseball Draft out of Northwestern University, Loretta made his professional debut with the Helena Brewers in 1993. He subsequently played with the Stockton Ports, El Paso Diablos and New Orleans Zephyrs. He was selected to the American Association All-star team during the 1995 season. Mark attended Saint Francis High School (La Cañada Flintridge).

Loretta made his Major League debut on September 4, 1995 for the Brewers against the Minnesota Twins and recorded his first hit on September 10 against the Texas Rangers. He remained on the Brewers every day roster as a utility player through 2002.