Luis César Alvarado Martínez (January 15, 1949 – March 20, 2001), born in Lajas, Puerto Rico was an infielder in Major League Baseball (MLB). From 1968 through 1977, he played for the Boston Red Sox, Chicago White Sox, St. Louis Cardinals, Cleveland Indians, New York Mets and Detroit Tigers. Alvarado batted and threw right-handed.