Tennis great Billie Jean King will preside over the 136th Rose Parade as grand marshal next year. King, who turns 81 next month, was introduced Monday in a shower of confetti on the lawn of Tournament House as “Philadelphia Freedom,” the hit song Elton John wrote for her, blared. King will ride the 5 1/2-mile route through the streets of Pasadena on Jan. 1 and be part of the coin flip for the 111th Rose Bowl football game later that day.