Smiley picked Western Michigan over multiple offers from BCS Conference schools including Illinois, Kentucky and Tennessee. Idaho and Troy were among the other programs to offer.
The 5-foot-9, 155-pound talent registered a 4.64 40-yard dash, 4.31 20-yard shuttle and 28-inch vertical at this January's Under Armour All-American Combine.
Brown, a 6-foot-1, 195-pound athlete, also received interest from Ball State, Bowling Green, North Dakota, Northern Illinois and Purdue, according to Rivals.
Western Michigan's Class of 2014 now holds seven pledges.