Randall Cobb took a big step forward in his recovery, but the Green Bay Packers' star receiver is still a few big steps away from actually playing in a game.

For the first time since fracturing his tibia on Oct. 13, Cobb practiced Wednesday. It was just last week that Cobb was finally cleared to run, so the player currently wearing the No. 18 jersey isn't nearly up to the same high standard yet that he created for himself by leading the Packers in receiving last season.

"I wouldn't say full speed," Cobb said. "Just trying to get back acclimated to running."

It's highly unlikely that a player -- especially one who relies on speed -- can go from that level of health to being game-ready in a matter of days.

"It's kind of like re-teaching myself to run routes again," Cobb said. "I have to go back to working my running form and go back to working off cutting in different ways and different directions and doing different things. Just focusing in on those little-bitty details in my running."

While Cobb wouldn't be any more specific about his timetable than to say he's "taking it day to day," it seems almost certain that he won't be on the field for Sunday's must-win home game against the Pittsburgh Steelers.

Cobb, who was eligible to return from injured reserve last week, confirmed that he has not been medically cleared. It's possible that he'll only play in another game this season if the Packers make the playoffs.

"I believe everything's healed; just getting back into football shape and trusting myself," Cobb said.

Wednesday's test was important for Cobb for those reasons. Overcoming the effects of a hit that made fellow receiver Jordy Nelson "sick" isn't an easy thing for Cobb to do.

"Definitely there's a mental block that I've got to run through," Cobb said. "I'm at the point where I have to continue to work and continue to trust my body and trust that I'm healed.

"You've got to be fearless playing this game and I have to get to a point where I'm not thinking about my knee and I'm worried about what I'm doing on the field."

Though Cobb mentioned his knee, that's not the area of his injury. However, given the location of the tibia and the knee, it's an indication of how impactful the injury can be to a player.