USA TODAYLions GM Martin Mayhew not concerned about Calvin Johnson's healthUSA TODAYBAGSHOT, England — Calvin Johnson has missed as many games in the last year and a half — four — as he did in his first six NFL seasons combined. But Detroit Lions general manager Martin Mayhew insisted Thursday he's not concerned about his star ...Mayhew not worried about Calvin Johnson's healthThe Detroit NewsReport: DT Nick Fairley seeking long-term deal from LionsCBSSports.comLions GM Martin Mayhew mum on Megatron's futureNFL.comMLive.com -NBCSports.comall 45 news articles »