Overview
- The club officially presented Castellanos on January 5 following his transfer from Lazio.
- Multiple outlets report a fee in the €29–30 million range including bonuses and variables.
- Reports differ on the contract length, with accounts of five seasons to 2031 or four-and-a-half years with an option for a further year.
- The signing addresses immediate scoring needs with West Ham sitting 18th in the table, four points behind 17th-place Nottingham Forest.
- West Ham also completed the acquisition of forward Pablo Felipe, with one report putting the combined net outlay for both attackers at about €52 million.