Danny Gabbidon used his Twitter account half an hour ago to say,
"Tweaked my hamstring in training today doing one on ones, absolutely fuming right now !!!"
The fact that Gabbidon says he has only tweaked a hamstring and not pulled a hamstring hopefully means that this isn't too serious. West Ham also do not have a game until next Saturday so that does give him over a week to recover.
Better news is that The Sun today reported that Scott Parker is on the verge of signing a new five year contract. They say the news will be released within a week.