Jason Day, Lydia Ko leading mixed-team event in Florida
NAPLES, Fla. — Jason Day and Lydia Ko shot 31 on the back nine in the tougher foursomes format Saturday, giving them a 6-under 66 for a two-shot lead in the Grant Thornton Invitational, the first mixed-team event since 1999. More than posting five birdies on the back nine at…