The Rangers are in Colorado for the weekend series against the Rockies, the final three games between these two teams in 2020 (unless, of course, they meet in the World Series). They know each other well after playing two exhibition games in late July and then a three-game series to start the season in Arlington.
Colorado is a half game up on the Dodgers in the NL West at 12-6 and the Rangers have a half game up on the Astros, holding second place (which is a playoff spot this season) in the AL West with an 8-9 record.