Roberto Nicolás Rexach Benítez (December 18, 1929 – April 4, 2012) also known as his stage name Bobby, was a Puerto Rican politician, and former Senator and Representative.

In 1951, Rexach Benítez received his bachelor's degree in social science from the University of Puerto Rico.

Some of them are: He died April 4, 2012, at his home in Arecibo, Puerto Rico from pulmonary complications traced to 40 years of heavy cigarette smoking.

[3] During a memorial service on April 5, 2012, before his remains were cremated, he was eulogized by Secretary of State Kenneth McClintock on behalf of Governor Fortuño, Puerto Rico Senate President Thomas Rivera Schatz and San Juan Mayor Jorge Santini.

[4] On April 9, the last of five days of official mourning declared by Governor Fortuño, a mass was held at San Agustín Church in San Juan at which Rexach was once again eulogized by McClintock[5] and Rivera Schatz, in their capacities as immediate past and present Senate presidents at the time.