Eflin pitched 5.1 scoreless innings for Triple-A Lehigh Valley on Thursday. He struck out four and walked three.
Eflin was scratched from his start Wednesday, but that was because the Phillies wanted to give him an extra day of rest. It was not due to the fact the Vince Velasquez left his start Wednesday with biceps soreness. David Buchanan came on in relief of Eflin on Thursday, keeping both pitchers on a schedule that would allow either of them to come up to the majors if Velasquez has to miss his next start.