Williams David Pérez Montes (born May 21, 1991) is a Venezuelan professional baseball pitcher who is a free agent.

[1][2] He made his professional debut with the Dominican Summer League Braves, posting a 2.35 ERA in 17 games.

In 2010, Pérez pitched for the rookie-level GCL Braves, registering an 0-6 record and 5.63 ERA in 12 games, 11 of them starts.

[5] Pérez debuted two days later, yielding two walks, two hits and four runs, while recording one out against the Washington Nationals.

Upon his return to the active roster, Pérez made six more starts, in which his ERA was 9.87, before being demoted to Triple-A Gwinnett on August 29.

[8] Pérez opened the 2016 season in the Braves starting rotation and made three appearances before he was optioned to Gwinnett on April 20.

[10] While facing the San Diego Padres on June 6, Pérez pitched five innings and left the game with an injury.

[15] He spent the season with the Triple-A Iowa Cubs, pitching to a 7-10 record and 5.01 ERA with 102 strikeouts in 120.1 innings of work.

[16] On November 20, Pérez re-signed with the Cubs on a new a minor league contract and received an invitation to spring training.

[19] Pérez made two appearances for the Miners in 2018, and pitched to a 1.64 ERA, allowing 2 earned runs and striking out 10 in 11.0 innings of work.

[20] He spent the year split between the Double-A Arkansas Travelers and the Triple-A Tacoma Rainiers, registering an 8-2 record and 2.47 ERA in 17 games between the two teams.