What is the most likely to improve? I can't say Mauer, because I am at a point with that, as Brock suggests, that something more serious is going on, so I don't see that changing. I'd like it to improve, and we need it to, but I just wonder if a number of issues are at play here, most specifically, concussion recovery. Look how long it took Morneau? So far this season he seems to be doing great; and most of last year many used the phrase 'a shell of his former self' in regards to him. So I wonder if the more serious the concussion, the longer the effects and recovery. And on top of that ... back issues? Maybe a psychological issue? Don't know, but I don't necessarily think Mauer will be the 'most likely obstacle' to improve. At least not this year.