Complex sentence: He made his MLB debut on May 15 of 2004 and was with the Indians in four different stints over the year, improving as the year went on, posting ann ERA of 2.70 in his last 30 appearances.
Split into simpler sentences: He made his MLB debut on May 15 of 2004 and was with the Indians in four different stints over the year. He improvied as the year went on, posting ann ERA of 2.70 in his last 30 appearances.