10:48pm: Rosenthal says the Astros agreed to sign Lyon for $15MM over three years. That's too much of a commitment in my opinion, but congrats to Lyon and his agent, Barry Meister. The Tigers get a supplementary rounder (not from the Astros) in next year's draft.
10:35pm: Rosenthal hears from one source who says Lyon received a three-year $15MM offer, presumably from the Astros.
10:13pm: The Astros are making a "strong run" for Brandon Lyon, according to Ken Rosenthal of FOX Sports. At least one outlet is reporting that it's a done deal. Mark Berman, the sports director of MyFOX in Houston reports that the Astros have agreed to a three-year deal with Lyon. It would be puzzling to see the Astros sign Lyon to a three-year deal the same day they lost LaTroy Hawkins to the Brewers because of their reluctance to go beyond a single year.