 On Peterson's watch, the Pirates remained consistent contenders and in 1979 won the National League pennant and defeated the favored Baltimore Orioles in a seven-game World Series.That Bucs' team, led by Hall of Fame slugger Willie Stargell, was augmented by two bold in-season trades made by Peterson.Frustrated with Frank Taveras' defensive inconsistency, Peterson dealt the erratic shortstop to the Mets for Tim Foli.