The Blue Jays have shut down Dustin McGowan because of plantar fasciitis in his right foot. McGowan attempted to throw off flat ground on Wednesday morning, but the lingering discomfort caused problems with his mechanics. "He felt like his arm slot would begin to vary a little bit, and that is the one telltale sign that we'll stay away from -- any variation from that putting the additional stress on the throwing motion," Blue Jays manager John Farrell said.