Complex sentence: In the 1917 season, Bell led Penn to a 9--2--0 finish, and afterwards, he registered with a Mobile Hospital Unit of the US Army for World War I and was deployed to France in May 1918.
Split into simpler sentences: In the 1917 season, Bell led Penn to a 9--2--0 record. Afterwards, he registered with a Mobile Hospital Unit of the US Army for World War I and was deployed to France in May 1918.