He pitches in the worst pitcher park in the history of baseball, and he's on a team that is absolutely freakin' horrible.
Look, Randy Johnson is a 3.86 lifetime ERA in this park. That's Randy Johnson!
If Francis somehow overcomes the elements and does a great job, what are you gonna get from him? Maybe ten wins and a high 4 ERA, and that's a generous estimate. Plus, the Rockies are sure to limit his IP to some extent, so you probably won't see him go more than 150-175 which means you get about 130 K's...maybe.
Leave him and all Rockies pitcher alone. It never ceases to amaze me that there are still some folks in the fantasy world that want to try and beat the undeniable odds by stabbing at a Colorado pitcher every year.