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The San Francisco 49ers finished last week's preseason opener with just four healthy defensive linemen. However, they seem to be getting healthier. Here is an updated player-by-player look at the health report:Justin Smith: The 49ers' starter, who hasn't practiced in training camp, is returning from offseason shoulder injury. He should be coming back soon. His absence is not a major concern. Smith, who turns 35 next month, will be ready for the season.