Rivaldo Marshall, a junior at Iowa representing Jamaica, won the men's invitational 800 meters by clocking a lifetime-best 1:46.86 at the Tyson Invitational at Randal Tyson Track Center in Fayetteville, Ark. Marshall also contributed to Iowa running 3:...<\/div><\/div><\/td><\/tr><\/table>\r\n\t\t\t\t<\/div>\r\n\r\n\r\n\r\n\r\n