Victor Alexander Mateo Nadera (born July 27, 1989) is a Dominican professional baseball pitcher who is a free agent.

He was signed by the Tampa Bay Devil Rays as a non-drafted free agent on November 15, 2006.

Starting his professional career the next year, the 17-year-old went 0–2 with a 6.39 ERA in 38 innings for the DSL Devil Rays his first campaign.

He also tied Floro, Drew Gagnon and Justin Nicolino for the Southern League lead in starts.

In 27 games (25 starts) for the two affiliates, Mateo compiled a 10–9 record and 3.41 ERA with 78 strikeouts across 147+2⁄3 innings pitched.

[8] Mateo split the 2016 campaign between Mississippi and Gwinnett, accumulating a 6.71 ERA with 31 strikeouts across 22 total appearances.