Answer: Kevin Millwood
Kevin Millwood began his MLB career with the Atlanta Braves in 1997 at the age of 22. He was with the organization through the end of the 2002 season.
Millwood posted a 75-46 record with an ERA of 3.73 in those 168 games he appeared in. He was a workhorse tallying over 1,000 innings pitched during his time with the Braves. This averages out to going right at six innings per start.
One statistic that stands out in his time with the Braves is one that Millwood probably was unaware of in 1997, WHIP (walks and hits per innings pitched). During his 6 season time frame with the Braves, his WHIP was 1.216 which is impressive for a starter seeing as much mound time as he had.