September 18 marks the start of the 2019 Arizona Fall League schedule and the Colorado Rockies will join the Arizona Diamondbacks, Miami Marlins, Minnesota Twins and Tampa Bay Rays with prospects on the Salt River Rafters club. Four Colorado pitchers (Ryan Castellani, Ashton Goudeau, Alexander Guillen and Antonio Santos) join catcher Brian Serven and infielders Bret Boswell, Roberto Ramos and Colton Welker and the Rockies representatives on the Rafters.
The Rafters will play their home games at Salt River Fields at Talking Stick in Scottsdale, the spring training home of the Rockies and the Diamondbacks.