Infielder Placido Polanco and the Tigers agreed Tuesday to an $18.4 million, four-year contract extension through the 2009 season. "This is exactly what the Detroit Tigers need," manager Alan Trammell said. "He's what I call a good ballplayer who does a little bit of everything." Polanco was acquired by Detroit from the Phillies on June 8 in the deal that sent right-handed reliever Ugueth Urbina and infielder Ramon Martinez to Philadelphia. "I see a team that's committed," Polanco said Tuesday of the Tigers. "They're putting together a pretty good team. They have a Hall-of-Famer [Ivan Rodriguez] behind the plate, they have Carlos Guillen and Magglio [Ordonez], they're putting together a very good team here. "If I didn't think they have a chance to be good, I wouldn't have signed here."