11/12/12 4:46 PM ET
Cubs hire Mainville as new head athletic trainer
By Carrie Muskat / MLB.com
Mainville, 37, worked in the D-backs' Minor League system from 2007-10 before he was named assistant athletic trainer to the big league team. He was a Minor League trainer in the Orioles' organization for nine years before joining Arizona.
O'Neal has been the Cubs' head athletic trainer since 2004.
Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings, and you can follow her on Twitter @CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.