The Detroit Tigers have signed more Major League free agents in the last week than they did all last winter. They've signed more players to Major League contracts -- three -- than nearly any other club. So does that mean, as the annual winter meetings open this week at Walt Disney World, that the Tigers are ready to put away the checkbook until April? Probably not. They've added a starting pitcher (Mike Fiers), some rotational depth (Ryan Carpenter) and a left-handed outfielder (Leonys Martin) to check off three key needs on their pre-winter wish list. The only thing left? Some help for the bullpen. Until Sunday, there had been little action on that front. Veteran Yusmeiro Petit signed a two-year, $10 million deal with the Oakland Athletics last week. He was joined on Sunday by Brandon Morrow (reportedly a two-year, $20 million deal with the Cubs) and Luke Gregerson (two years, $11 million with the Cardinals).