Alex Smith acknowledged this week he didn’t know much about new Chiefs wide receiver Donnie Avery because they had never been teammates until now. But Smith, the new Chiefs quarterback, knew one important fact about Avery: He can run fast. And for someone who plays Smith’s position, that’s enough. “I’m happy to have him as a teammate,” Smith said. “As a quarterback, you love the fast guys.” New Chiefs general manager John Dorsey and coach Andy Reid love the fast guys, too. One of the first things they noticed after arriving in Kansas City and studying the players was that the Chiefs didn’t have a true deep threat at wide receiver. Devon Wylie, a fourth-round draft pick last year, and Jamar Newsome, who started two games for the Chiefs last season, are fast. But they aren’t Avery fast.