Charlie Brennan - Tuesday, September 23 - St. Louis Entrepreneur Grady PhelanC harlie with the 66th in a series on growing innovative entrepreneurism in the STL region with Grady Phelan, STL inventor of ProXR Bats.
As MLB Season Begins, New Bats DebutLouisville Slugger says changes have been made to the hardness of its bats.

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