The Facts: Carr and Amari Cooper aren't neighbors, but they don't live far apart. That made games of catch convenient at local parks this spring, and the franchise quarterback and top receiver have taken advantage. Cooper joined Carr's off-the-books passing camp this summer, and the pair asked to be roommates in a training camp that started last week. They aren't a natural fit. Carr's a talkative sort, and Cooper, more talkative now with greater comfort as a pro, would never be called gregarious. The pair are working well together, even in tight quarters. "We're having a good time, man," Carr said. "I know how he thinks. I know how he likes to go about his business. I know what he likes to do off the field."

Diehards Line:There’s a concerted effort to enhance chemistry in a big year for both. Carr and Cooper had solid seasons in 2015 but are looking to become an elite pass-catch combo this year, pulling out stops to expedite the process. “Amari and I should have the best relationship ever. The same thing goes with all of my receivers and all my teammates, really. The fact that we’re roommates only helps because we get to see each other away from football, away from the coaches. It’s been awesome.” According to CSNBayArea.com's Scott Bair, Carr and Cooper have seemed in sync since the offseason program. Observers made note of the enhanced connection between quarterback and wideout, and great sync is a goal because one can’t truly improve without the other. Carr threw for 3,987 yards last season; 27 percent of that sum went to Cooper. He was targeted 123 times, on 21 percent of Carr’s passes. The completion rate was under 60 percent, a number they’d prefer higher.