Complex sentence: Brown is a graduate of the University of Michigan, where he played defensive back before moving on to an eight year career in the NFL (1993-1996 with New England, 1997-1998 with New York, 1999-2000 with Detroit).
Split into simpler sentences: Brown is a graduate of the University of Michigan, where he played defensive back. Brown had an eight year career in the NFL (1993-1996 with New England, 1997-1998 with New York, 1999-2000 with Detroit).