The first author was drawn to annual ryegrass (Lolium multiflorum) when he viewed a reseeding stand of annual ryegrass at Kinderlou, GA in 1970. He soon began an evolutionary recurrent selection program using this ecotype and others. He continued to add new breeding nurseries until he had contributed to over 30 new cultivars. A number of cobreeders and cooperators helped in developing diploid and tetraploid cultivars, some with excellent cold tolerance, all having good crown rust (Puccinia coronata) resistance and some resistance to Helminthosporium leaf spot (Dreschlera spp.) disease. In the last 10 years there was some selection for resistance to gray leaf spot (Pyricularia grisea) disease. The experimental name, cobreeder's name, a brief description of attributes of each cultivar, the germplasm sources used in breeding, the seed company producing seed and the official name of cultivar will be reported. The success of the breeding program is due to ryegrass cooperators in Florida and other states aiding in testing of each new cultivar. These coauthors continue the Florida ryegrass program in developing new diploid and tetraploid ryegrass.