Martinez begins his first season with the Ducks and sixth in professional baseball. The right-hander spent the 2025 campaign with the High-A Quad Cities River Bandits of the Midwest League, appearing in 36 games (1 game start) overall, tallying a 2.08 ERA and four saves to go along with 47 strikeouts in 52.0 innings pitched. The 25-year-old native of El Salvador pitched in 2024 with the Single-A Columbia Fireflies of the Carolina League and the Arizona Complex League Royals, combining to collect 30 strikeouts in 30.2 innings pitched across 20 games and one game start.