Mar. 21 3:20 PM PT4:20 PM MT5:20 PM CT6:20 PM ET22:20 GMT6:20 AM 北京时间3:20 PM MST5:20 PM EST4:20 PM CT2:20 UAE (+1)18:20 ET21:20 - The Panthers have announced they've signed free agent quarterback Joe Webb to a one-year contract. Terms of the deal were not released Friday. Analysis: Webb gives the Panthers an extra quarterback during offseason workouts with Cam Newton out four months rehabilitating from ankle surgery. Webb spent the last four seasons with the Minnesota Vikings, seeing action at quarterback and wide receiver. The Panthers said in a press release they plan to use Webb at quarterback.