The Detroit Tigers have made no promises to Jose Valverde. Team president and general manager Dave Dombrowski announced Thursday that the Tigers have agreed to terms with Valverde on a Minor League contract that includes an opt-out clause if he isn't in the big leagues by May 5. But the Tigers, who don't have a set closer after letting the three-time All-Star become a free agent, took a step Thursday toward bringing Valverde back by agreeing to terms on a minor-league contract. Valverde will report to the team's extended Spring Training program in Lakeland, Fla., and throw to hitters before joining Triple-A Toledo. After an offseason and Spring Training of debate about the pros and cons of a rookie closer, followed by weeks of questions about a closer by committee, the Tigers are going to take a look at their former closer. The right-hander they call Papa Grande, who led the American League with 49 saves just two years ago, must prove he can still pitch well enough to warrant a spot in the back of their bullpen.