The Chicago Cubs may not be wasting time trying to find another starting pitcher to go along with Shota Imanaga. USA Today’s Bob Nightengale reported on Sunday that the Cubs and the Pittsburgh Pirates were engaged in “serious trade talks” about pitcher Mitch Keller. Earlier this week, The Athletic’s Ken Rosenthal wrote that Keller could be available at the trade deadline, even though he signed a five-year extension with the Pirates last year.