Rabell Saúl Rivera (born December 7, 1977) is a Puerto Rican former professional baseball pitcher.

He played in Major League Baseball (MLB) for the Washington Nationals and Arizona Diamondbacks.

In 2000, he began the season with the advanced Single-A Fort Myers Miracle before receiving a promotion to the Double-A New Britain Rock Cats.

On July 16, 2002, the Mets sent Rivera to the Montreal Expos as the player to be named later for the April trade of Bruce Chen, Dicky Gonzalez, and Luis Figueroa to Montreal in exchange for Scott Strickland, Phil Seibel, and Matt Watson.

Rivera spent 2007 between the major league club and the Triple-A Columbus Clippers, pitching in 85 games for Washington.

[1] On December 21, 2009, Rivera signed a minor league contract with an invite to Spring training with the Cleveland Indians.

[2] He would play for the Triple-A Reno Aces, but also appear in 4 major league games for Arizona, pitching to a 22.09 ERA over 3.2 innings.

On August 21, 2010, Rivera re-signed with the Cleveland Indians on a minor league contract, and was assigned to Triple-A Columbus the following day.

On July 31, 2012, Rivera signed with the Sugar Land Skeeters of the Atlantic League of Professional Baseball.