WEST HAM have signed club legend Alvin Martin’s son David on a two-year deal from Millwall. The 33-year-old is the second goalkeeper to join the Hammers this week following the arrival of Roberto from Espanyol. Martin has followed in the footsteps of his father – who made just under 600 appearances for the club from 1976 to 1996. He has vowed to battle for his spot in West Ham’s first team despite making just 15 appearances for Millwall in two years.Speaking on the club website, he said: “Signing for West Ham United is a dream, both for me and my family. “I’ve grown up around West Ham and to come to my boyhood club is a dream. “I came to games as a kid as one of the supporters in the stands at the Boleyn Ground. “I loved watching my dad play, and I’ve continued coming to games throughout my career.”You can see the impact the fans can have on the team and it gives you goosebumps. The fans at West Ham are brilliant and it’s fantastic to be a part of this great club. “I’ve always been an enthusiastic and positive person – I’ll always go into training every…