Twins manager Ron Gardenhire said Friday that Kyle Gibson, P.J. Walters, or Sam Deduno will be called up to start Friday against the Tigers. The Twins optioned left-hander Pedro Hernandez to Triple-A Rochester on Monday, which immediately led to speculation that Gibson could get the call. The 25-year-old right-hander has a 3.25 ERA and 46/14 K/BB ratio in 52 2/3 innings through eight starts this season in Triple-A. Even if the Twins opt for Walters or Deduno, it's just a matter of time before Gibson arrives.