- Mike Sando, NFL Insider
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1. Signing Perrish Cox. The 25-year-old corner had not played since 2010, his rookie season with Denver. The 49ers' secondary coach, Ed Donatell, was with the Broncos at that time. His feel for Cox smoothed the way for San Francisco to add the cornerback this offseason. Cox competed well enough during minicamps to serve notice that he could be a factor in the secondary. That has continued during training camp. Cox has contributed on special teams as well. This storyline remains alive.
2. Moving Boone to right guard. Initial expectations were for Alex Boone and Daniel Kilgore to compete for the vacant starting job at right guard. Well, Boone appears to have won the competition decisively. Kilgore projects as a backup center now. Leonard Davis, signed this summer, provides veteran insurance for Boone. So far, though, the 49ers appear happy with what Boone is offering them. Boone is taller than the typical guard. He's working on staying low. Boone's tenacious demeanor seems to mesh well with tackle Anthony Davis on the right side.
3. Positional shuffling. Will Tukuafu, Michael Wilhoite, Cory Nelms, Ben Hannula and Demarcus Dobbs were among those singled out in the previous item for their ability to play more than one position. The 49ers were seeking the kind of roster flexibility teams covet. Dobbs stands out as the big success story to this point. He's playing defensive line and tight end, with encouraging results. As coach Jim Harbaugh said recently, "We still don't know what that ceiling is yet. So, I don’t think that ceiling is in site for Demarcus." It looks like Dobbs could emerge as the third tight end, especially with an injury removing Nate Byham from the equation.