Manuel Elias Acta (born January 11, 1969, in San Pedro de Macorís, Dominican Republic) is the manager of the Cleveland Indians. He is a former manager of the Washington Nationals in Major League Baseball. In the Dominican Winter League, he managed the Tigres del Licey from 2002–2004, including leading them to victory at the 2003 Caribbean Series. Acta managed the Dominican Republic team at the 2006 World Baseball Classic.
Acta was signed by the Houston Astros at age 17 as a first baseman. He reached Double-A as a backup first baseman and an outfielder at age 20. Acta played baseball professionally for six seasons, all in the Astros' system, but never reached the major leagues as a player. The Astros organization would eventually send him to scouting school in Florida to utilize his analytical skills rather than his athletic talent.
In 1991, Acta became a player-coach at the A level, and soon after that quit his playing career and focused solely on coaching. He became the manager of an A-level team in 1993, and he managed in the minors through 2000. He led the Kissimmee Cobras to a Florida State League championship in 1999.