Pettibone is the closest to the major-league level, as the 22 year old split the year between Double-A Reading and Triple-A Lehigh Valley. He recorded a 2.55 ERA in 42⅓ innings at the higher level, recording four wins in seven starts. Martin was the highest touted of the foursome after being selected 15th overall in 2008. He went 5-0 in seven starts with Reading after being acquired in the Shane Victorino trade, posing a 3.18 ERA. May won the 2011 Paul Owens Award for the best pitcher in the Phillies' minor-league system, and had another strong year leading the Eastern League in strikeouts with 151. Collier hit .269 this year for high-A Clearwater. All the prospects are either 22 or 23 and were selected in the 2008 MLB Draft in the fourth round or higher.
Tuesday was the deadline for teams to protect players from the 2008 draft from being selected in the Rule 5 Draft by adding them to the 40-man roster. Players on the roster are not eligible to be selected in that draft, which allows teams to take prospects from other clubs with the provision that if they do not stay on an active roster all year, they have to return to the original club. All players on the 40-man roster are eligible to be called up to the major-league squad.