"We haven't committed to that," manager Joe Torre said. "He's scheduled to start tomorrow, but we made the call to hold off. That's likely what we'll do."
McDonald would be getting a second shot at the fifth starter spot. The job was his to lose coming out of Spring Training in 2009, and he lost it. He was in the running this spring, but lost the competition to Charlie Haeger and spent the first half of the season getting more seasoning with the Isotopes.