On July 9, 2017 — Jon Lester has the worst start of his career for the Cubs as he allows 10 runs on 6 hits and 3 walks in only two-thirds of an inning as the Pirates jump to a 10 – 0 lead in the 1st inning, on their way to a 14 – 3 win. Francisco Cervelli has the key hit, a grand slam as the Cubs finish the first half two games below .500, one year after ending their long World Series drought.

Source:
Baseball Reference July 9