Southern Baptists, voting at their annual meeting, winnowed their list of candidates for convention president Tuesday evening from six to three. The candidates in the run-off election are Clint Pressley, senior pastor, Hickory Grove Baptist Church, Charlotte, NC; David Allen, professor and dean at Mid-America Baptist Theological Seminary, Cordova, Tenn.; and Dan Spencer, senior pastor of First Baptist Church, Sevierville, Tenn.