“The boys have received me very well, the coach and everyone,” said the South American on the website of the London team, located in the relegation zone of the Premier League.
The Portuguese Nuno Espírito Santo, coach of the team, identified the attacker as a key objective for the team in its ambition to continue in the first division.
Nuno took charge of the squad last September and the media speculated about his continuity after the 0-3 defeat on Saturday against bottom club Wolverhampton, a rival without a win all season.
The new setback left the Hammers in 18th place in the standings and they will now face Nottingham Forest on Tuesday.
Castellanos, 27, had two goals in 12 games for Lazio this season after a hamstring injury interrupted his performance.
In addition, he defended the colors of the Argentina national team in two games, became Major League Soccer champion with New York City FC and joined Lazio in 2023, with a total of 22 goals in 98 games.
arc/am