Real Sociedad B vs Castellón: Prediction, Betting Tips and Match Preview

The new Segunda División season kicks off with a matchup that already feels lopsided. Real Sociedad B looked fragile last term, and their summer preparations have done nothing to inspire confidence. In contrast, Castellón arrive with purpose, a clear identity, and a transfer window that addressed every gap. The visitors look far better equipped to handle the demands of the opening round.

Real Sociedad B: A Quiet Transfer Window

Real Sociedad B ended the previous Segunda campaign in 15th place, collecting 47 points from 42 matches. Their preseason form was alarmingly poor: five friendlies yielded four defeats—losses to Zaragoza (1–2), Huesca (0–2), Eibar (0–1), and Burgos (0–2)—with only a single win against lower-tier Po (4–0) offering any respite. The defensive frailties were plain to see, and the side consistently allowed opponents to dictate play.

The transfer activity has done little to patch those holes. The Basque reserve team lost key central midfielder Mikel Rodríguez to Alavés, along with two important right‑backs—Alberto Dadie (free agent, joined Burgos) and Iñaki Ruperez (promoted to the first team). Their only incoming move was young forward Javier Soroeta from Real Unión. Losing three core defensive and midfield players without adequate replacements has left the squad disjointed and undermanned heading into the new season.

Castellón: Ready to Fight for Promotion

Castellón enjoyed a strong previous season, finishing sixth with 72 points. Their summer friendly campaign showed a team in good rhythm: a 2–1 win over Valencia, a 2–0 victory against Sabadell, a penalty‑shootout win over Hércules after a 0–0 draw, and a 3–3 draw with Girona. The only defeats came against higher‑quality opposition in Alavés (0–3) and Levante (1–3). Overall, the team looked cohesive and ready for the challenges ahead. The clear objective for the season is to secure a playoff spot and push for promotion to La Liga.

Castellón did lose several key pieces: attacking midfielder Álex Calatrava (to Espanyol), defender Joshua Vertroud (Rayo Vallecano), wingers Brian Sippinga (Almería) and Awer Mabil (Grasshoppers), and left‑back Salva Ruiz (Huesca). However, the club responded decisively by bringing in goalkeeper Amir Saipi (from Lugano), winger Rodrigo Rego (on loan from Brighton), left winger Íñigo Córdoba (Burgos), midfielder Yari Vlac (ADO Den Haag), and defender Agustín Cienra (Defensa y Justicia). Every departure was met with a quality replacement, and the new signings should slot in seamlessly. The squad has actually deepened in quality, giving Castellón a clear edge in squad depth and tactical flexibility.

Prediction and Bet

Main prediction: Castellón to win The visitors are the more complete, cohesive, and classy side. They are well‑stocked across the pitch, their preseason performances against strong opponents (Valencia, Girona) were impressive, and they retained a potent attacking threat. Real Sociedad B, on the other hand, did little to strengthen over the summer, and a run of four losses in five friendlies exposed deep defensive problems. Even at home, the Basque reserve team looks unlikely to hold off a motivated Castellón. Backing the visitors for the win at odds of 1.86 is the sensible play. That price implies a 54% probability, but our assessment puts it closer to 56%—anything above 1.76 represents value.

Total goals prediction: Over 2.5 Head‑to‑head meetings between these sides have been goal‑filled affairs. In their two most recent encounters (2025–2026), Real Sociedad B won 4–2 and Castellón triumphed 5–4 in a shootout. Both teams favor an open style and are not afraid to take risks in attack. With the home side’s defensive vulnerabilities and Castellón’s array of offensive weapons, the opening round of Segunda should produce plenty of chances and goals. Betting on over 2.5 goals at 1.70 looks solid, with our estimated probability around 61% (the threshold for value is 1.62).