Complex sentence: After retiring from baseball, Stanley signed with the Detroit Caesars professional softball club in 1979, playing part-time as the team advanced to the APSPL World Series losing to the Milwaukee Schlitz.
Split into simpler sentences: After retiring from baseball, Stanley signed with the Detroit Caesars professional softball club in 1979. He played part-time as the team advanced to the APSPL World Series but lost to the Milwaukee Schlitz.