Original: History Early developments The New York Knickerbockers were the first baseball team to use uniforms , taking the field on April 4 , 1849 in pants made of blue wool , white flannel shirts and straw hats .
Simplified: Their uniforms were pants made of blue wool , white flannel shirts and straw hats . History Creation On April 4 , 1849 , the New York Knickerbockers became the first team to use uniforms .