Warm season grass cover crops include sorghums (tribe: Andropogoneae), millets (tribe: Paniceae), and teff (tribe: Eragrosteae). These cover crops are grown in grain and vegetable cropping systems of tropical, subtropical, and temperate climates. Due to their rapid biomass production and extensive root systems, these cover crops can increase soil aggregation and porosity. Improvements in soil structure lead to enhanced water infiltration and retention. The fibrous roots also scavenge nutrients. Warm season grass cover crops provide effective weed suppression because they are highly competitive, allelopathic, and form dense mulches, depending on species and management. They can contribute to insect pest and disease management as well. This chapter reviews advantages of warm season grass cover crops as well as potential disadvantages such as soil moisture depletion and nitrogen immobilization. Best management practices, breeding progress, and emerging directions for the incorporation of warm season grass cover crops into cropping systems are also highlighted.