Dennis Weaver Jr., better known as Rapper Monotone, has opened for Michael Franti and Spearhead, Talib Kweli and De La Soul. But the 34-year-old West Sacramento resident doesn't usually perform in the big shows that hit the area. However, people who love the music of Monotone's group, MLS, can hear the musicians play Saturday when they release their EP "Target Practice" at Capitol Garage. Local hip hop acts Mahtie Bush, Tribe of Levi, Izreal, 2-4-1 and Torrance the Poet also will perform. Those in the know can recite the double meanings behind the initials MLS: "Monotone and Lou Slugga" and "Major League Spittaz." Monotone's a valley guy. He was born in Fresno and moved to Sacramento whe