The 29-year-old moved to the West Midlands outfit in 2012 and after establishing himself as a regular in the team, the Argentine has penned a new deal which will keep him at the Baggies until 2018.
Yacob told the club’s official website: “I’m pleased to sign a new deal with the Club.
“It wasn’t a difficult decision because everyone working at the Club, the fans and the players have all made me feel very comfortable since I’ve been here. Hopefully I can continue to play in the team. I’m happy.”
Yacob has scored once in 129 appearances in all competitions since joining West Brom from Argentine side Racing Club.