SAN DIEGO -- Chargers running back Ryan Mathews missed his second straight practice Thursday with a high ankle sprain.
The rookie's prospects of playing decrease with every missed practice, making it less likely he'll be available for Sunday's game at Seattle.
"He's getting better," coach Norv Turner said. "I haven't ruled [him] out. I'm going to see where we are in the next two days."
Mathews was hurt in Sunday's home victory against Jacksonville.
He tested his right ankle on the treadmill and in some cutting exercises before practice, but did not participate in the session. He said the joint is sore and uncomfortable, but it won't stop him from playing if given the green light.
"I can play," Mathews said. "There's a difference between being hurt and being injured. I can play in pain. It may be a bit uncomfortable, but as long as my bone's not sticking through the skin, I'm good to go. But I know that it's the trainer's decision and I'll go along with whatever they decide."
If Mathews can't play, Mike Tolbert will be the Chargers' primary rusher. He assumed that role after Mathews got hurt in the first quarter against the Jaguars and had 82 yards and two touchdowns on 16 carries.