The Australian defender went for X-rays with his arm in a sling in Peterborough on Tuesday night amid concerns that he had broken a bone following a collision with David James.
Glenn Roeder feared that he could have been ruled out for six weeks or more, but Ges was happy to confirm the good news: "It is badly bruised rather than broken, though he has probably caught a nerve.
"It is a case of how uncomfortable it is before he returns but in any event he should be able to keep up his general fitness with cycling and suchlike.
"Hopefully he will be able to train later in the week."
Roeder adds: "I'm pleased there is no fracture on the forearm because it was a real concern.
"We are already short in that department so the last thing we needed was another injury to a centre half."
Another position where West Ham are short - momentarily, at least - is goalkeeper.
Fans were puzzled as to why neither Craig Forrest or Shaka Hislop were on the bench at Peterborough - leaving veteran Ludek Miklosko as the man ready to stand in if David James had got injured!
Glenn says: "Ludo was on the bench simply because Shaka and Craig had picked up minor knocks that made them unfit for the game.
"It is a little bit worrying that two senior goalkeepers have gone down within a day of each other but I am told by John Green that they will be no more than a few days.
"We registered Ludo as a player just in case, but it really was just in case.
"We don't want to be in a position where we have to use him and I don't think he wants that either.
"He might play a few reserve games next season, but he is here to coach the keepers and so far I have been very pleased with him."