Richard -
It also looks good to me. That said, I am not an autograph expert. My point of reference is my time looking through his granddaughter's collection. However, without yours in hand- it's hard to say. You can see a guaranteed authentic signature on his Federal league contract from 1915 which is on my file center:
http://www.blacksoxfan.com/file_cent...wse.php?cat=12
Ted