There was a shake-up at the top of class 4A in the latest RadioIowa/Baseball Coaches Association high school poll. At 17-2, Sioux City North moves up two spots to take over as the top rankedteam in 4A. Marshalltown is second, West Des Moines Valley is third.Previsouly top ranked Iowa City High is fourth and Bettendorf falls threespots to fifth. The other top ranked teams remain the same this week.Davenport Assumption is top ranked in class 3A. Vinton-Shellsburg is secondfollowed by Knoxville, Perry and Oelwein debuts at number five. AlgonaGarrigan is top ranked in 2A. Iowa Falls is second, Osage, Council BluffsSt. Albert and Sergeant Bluff Luton complete the top five. Lisbon remainstop ranked in class 1A. Iowa Valley is second then its Granville Spalding,Nora Springs Rock Falls and Storm Lake St. Marys.