But Edwards is confident things will be different against Houston.
"Hopefully, Saturday will be a platform for me to show I can make it through a game," Edwards said.
Edwards has been practicing all week and hasn't missed a snap despite the fact his right groin is still tender.
The problem surfaces most when Edwards is making cuts, but the pain hasn't been enough to keep Edwards on the sideline. He simply won't let it.
And that has been good news for Wannstedt.
"Robert has been out here every day and practicing," Wannstedt said Wednesday. "I'm going to be optimistic and say we're over the hump with him as far as any setback."
Ricky Williams is expected to play until the early stages of the third quarter against Houston, with Travis Minor and Edwards splitting the carries after that.
Edwards said how he is used on Saturday will tell him what his role on the Dolphins is going to be.
Regardless, Edwards is just looking to show anybody who's watching that he's back after three long years of rehabbing.
"(His game against New Orleans) was nothing to catch anyone's eye," he said. "I want to turn people's heads and make them say, 'Wow, I can't believe what he's doing after all he's been through.' "