I think Ben Brown is far more likely to make a bullpen impact than Horton, personally. Especially if the Cubs get, say, a Glasnow, there will likely be starts available. Hendricks, Steele, Taillon and Glasnow have injury histories, and it's likely they'll go down. I'd expect Horton, who's pretty ready as of now, will be option #1 and kind of think he'll make 10-15+ MLB starts this year. Brown, however, with the more spotty fastball control is less likely ready to start, but also, could be a really fun BP addition post-TDL. Might make a few spot starts, but I think I expect him to make more impact bullpen wise.