The OP said that Rucker's said that Walls hurt his achilles. According to Hubbs most recent report, Walls went down with injury to his foot/ankle, got up in some pain, but "by no means no agony" and hobbled to the training table for examination. He has been taken to the training room for evaluation.
Hubbs initially responded to calm an immediate freakout by one of the posters on TOS. Sounds like now we won't know the extent of any injury until later. But, again, Rucker's supposed immediate report was pretty extreme.