 Kọ itẹsiwaju fun paragirafi yii - Lẹhin ti o ti ṣere bọọlu inu agbọn ile-ẹkọ giga ni Westark Community College ni bayi Ile-ẹkọ giga ti Arkansas  Fort Smith ati Ile-ẹkọ giga ti Arkansas, Walker ni a yan nipasẹ New York Knicks pẹlu yiyan 12th ni iyipo akọkọ ti NBA draft 1983 : ó ṣe tán. Láàárín ọdún mẹwàá tó fi gbá bọọlù, ó gbá bọọlù fún ẹgbẹ márùn-ún - ìyẹn àwọn Knicks, Denver Nuggets, Washington Bullets, Detroit Pistons, àti Chicago Bulls. Ọmọ ẹgbẹ Kappa Alpha Psi ni Walker. 