As coach Oliver Jose Marmol (born July 2, 1986) is an American professional baseball manager and former infielder who is the manager of the St. Louis Cardinals of Major League Baseball (MLB).

He played in the Cardinals organization for four seasons, batting .203 as a utility player for the Batavia Muckdogs of the Class A-Short Season New York-Penn League, the Quad Cities River Bandits of the Class A Midwest League, and the Palm Beach Cardinals of the Class A-Advanced Florida State League.

The next season, he became manager of the Johnson City Cardinals of the Rookie-level Appalachian League,[3] and led the team to the postseason.

In 2013, he managed the State College Spikes of the New York-Penn League.

[12] Before the 2024 regular season began, Marmol and the Cardinals agreed to a two-year contract extension.