Keith Ballard

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Keith Ballard, superintendent of Tulsa Public Schools, addresses a huge crowd of teachers, parents and children gathered at the Oklahoma Capitol building in Oklahoma City, Monday, March 31, 2014, to call for an increase in school funding, which hasn't reached its pre-recession levels despite the addition of tens of thousands more students to the state's classrooms. (AP Photo/Sue Ogrocki)

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Minnesota Wild defenseman Keith Ballard (2) holds Edmonton Oilers left wing Luke Gazdic (20) off the puck during the second period of an NHL hockey game in St. Paul, Minn., Tuesday, March 11, 2014. (AP Photo/Ann Heisenfelt)

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Vancouver Canucks' David Booth, right, misses the check on Minnesota Wild's Keith Ballard and crashes into the glass during the first period of an NHL hockey game Friday, Feb. 28, 2014, in Vancouver, British Columbia. (AP Photo/The Canadian Press, Darryl Dyck)

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Minnesota Wild goalie Darcy Kuemper (35) deflects a shot by Tampa Bay Lightning right wing J.T. Brown (23) as Wild's Keith Ballard, left, defends during the second period of an NHL hockey game in St. Paul, Minn., Tuesday, Feb. 4, 2014. (AP Photo/Ann Heisenfelt)