Complex sentence: Darling's three starts for Montreal were poor, with an ERA of 7.41, and on July 31,1991, the Expos traded Darling to the Oakland Athletics for two minor leaguers.
Split into simpler sentences: Darling's three starts for Montreal were poor with an ERA of 7.41. The Expos re-traded Darling to the Oakland Athletics on July 31,1991 for two minor leaguers.