In the Rockies, the Marlins host a team capable of winning 13 of 17, as they did in June -- then of losing eight straight, as they also did in June. In Florida, the Rockies visit a destination with a great chance of suffering some summer rain. Says here the Marlins gain a psychological edge if the tarps need to be rolled out on Wednesday at 7:05 at Dolphin Stadium (2269 NW 199th St., Miami). Tickets start at $9, and are easy to get at the box office, at florida.marlins.mlb.com, or by calling Ticketmaster at 954-523-3309.