Nnamdi Asomugha is having to play his way onto the 49ers roster.Though the veteran had some All-Pro seasons across the bay with the Raiders, he was signed by the Niners after two disappointing seasons in Philadelphia. Then, early in training camp, he received less-than-stellar reviews of his performance."We really didn't know what we were getting when we got Nnamdi," defensive coordinator Vic Fangio told reporters earlier this month. "He's had some good days out here and some days when we weren't sure if he'd be able to still have it."I think we're kind of in between on him right now. Hopefully, he'll still be able to have some gas left in his tank to go out there and play like he did prior to going to Philadelphia. So I think the jury is still out there."But on Friday night in the 49ers' second exhibition game, a victory over the Chiefs in Kansas City, some of the jurors reported in. Their assessment? Asomugha had a solid game.Kevin Lynch of the San Francisco Chronicle reported that Chiefs quarterback Alex Smith appeared he wanted to test Asomugha, looking in his direction six times. But, wrote Lynch, Smith went elsewhere four times because of Asomugha's solid coverage, and the...