It's a wonderful and fun arrangement, too, not trying to overwhelm such a small, charming song with orchestral bombast, but arranged with an almost old-timey feel. And Muti seems to be having a good time with it all.
I find it adorable that Muti seems to love the Cubs, particularly since he's from Italy and didn't grow up on baseball or perhaps ever played it at all. But we know now that he's a lefty. Not the same form on the mound (or front thereof) as on the podium, but he did get it to the plate.
By the way, listen closely in the background as he walks to the mount. The P.A. is playing Beethoven's 5th Symphony.