There were 2 outs and runner on 1st and second, Cano struck out, but the ball got away from the catcher, Cano ran to first, and when the catcher threw it to the firstbaseman(sorry, I don't know thir names), it went past him, then they called Cano out becuase he wasn't in the little running path, therefor he interfeared with the play and should be out. Only problem was, Cano took a step out of the box/path, and the very next one in the Path, so it really wasn't so far out of the Box to be called out...and the Ump wasn't even standing at the line to have a clear view, he was standing away, and couldn't have had a clear view of what happened..
But the bad part about the call is that Cano in no way interfeard with the 1st baseman, he just flat out missed the ball