I was only able to watch Chapman's first inning of work today but he sure was impressive in that first inning. He made Tulowitzki look foolish on a 79 mph changeup, and then the next two batters made weak contact. I didn't think anything of it at the time, but I noticed his velocity was down from where it was in his previous outings. Even though it doesn't sound like his back problem is serious, this will probably cost him a chance at starting the season with the Reds. I'd be cautious with him and I'm sure the Reds will.