FRIDAY, 8:12am: MLB.com's Jason Beck hears (via Twitter) from another source who agrees: Valverde has four offers and the Tigers are interested.
THURSDAY, 3:17pm: The market for Jose Valverde finally appears to be picking up. It's been relatively quiet for a few months, but the reliever now has four offers, according to Yahoo's Tim Brown (via Twitter). All of the offers are for closing jobs and two of them are multi-year proposals. Brown says the Tigers and D'Backs "are in," so they've presumably made two of the offers.
The incumbent closers for the Blue Jays, Marlins, A's and Pirates don't have much seniority, but it's hard to imagine these teams spending big on Valverde.