ACL Mariners vs ACL Rockies is a rookie-level Arizona Complex League baseball game between the Seattle Mariners’ and Colorado Rockies’ developmental squads. It is played at Salt River Fields at Talking Stick in Scottsdale, a Major League spring training complex that serves as the Rockies’ and Diamondbacks’ facility and is notable as the first MLB park built on Native American land. The contest forms part of the regular-season schedule where early-career prospects gain game experience and evaluation within their parent clubs’ farm systems.