César Octavio "Tavo" Álvarez (born November 25, 1971) is a Mexican former Major League Baseball pitcher.

[3] After signing the contract, he played the rest of the 1990 season with the Expos' rookie affiliate, winning five games and losing two.

[4] Alvarez played his full first professional season with the Class A Sumter Flyers in 1991, posting a 12–10 record and a 3.24 earned run average (ERA).

[4] He had a career year in 1992, playing for both the West Palm Beach Expos and Harrisburg Senators, combining for 17 wins, five losses, and a 1.74 ERA.

[4] After spending 1994 in the Mexican League, Alvarez did not re-sign with the Expos until April 1995 due to visa problems.