Local inventor Grady Phelan received confirmation last week that his design for an ergonomic baseball bat knob complies with Major League Baseball and NCAA rules regulating bat configuration. The patented, angled knob increases the stability of a player’s grip and reduces the pressure a typical knob produces on the base hand during a swing. The result is fewer thrown bats and fewer hand injuries. Phelan won positive reactions from St. Louis Cardinals players who tested prototypes during Spring Training. Now he’s teamed up with Kevin Short and James von der Heydt of Clayton Capital Partners to seek a licensing deal with a bat manufacturer such as Rawlings or Louisville Slugger.