Carlos Alberto Rivera (born June 10, 1978) is a Puerto Rican former professional baseball first baseman.

He played in Major League Baseball (MLB) for the Pittsburgh Pirates.

Rivera played his first professional season with their Rookie league GCL Pirates in 1996, and last played with an MLB-affiliated team in 2006 with the Colorado Rockies' Triple-A team, the Colorado Springs Sky Sox.

In 2007, Rivera hit .410 with 16 home runs and 73 RBI in 101 games for the Oaxaca Warriors in the Mexican League and was a midseason All-Star.

After starting the season with the Petroleros de Minatitlán of the Mexican League, Rivera signed with the Wichita Wingnuts of the American Association on July 30.