Complex sentence: He recovered in 2003, making 25 starts for first the Hammerheads and then the Double-A Carolina Mudcats of the Southern League, going 12--9 on the year with an improved ERA of 3.41,138 strikeouts, and 70 walks in innings pitched.
Split into simpler sentences: He recovered in 2003, making 25 starts between the Hammerheads and the Double-A Carolina Mudcats of the Southern League. He finished the year with a 12--9 win-loss record, an improved ERA of 3.41,138 strikeouts, and 70 walks in innings pitched.