The Phillies optioned Lazar to Triple-A Lehigh Valley on Saturday, Alex Coffey of The Philadelphia Inquirer reports.
Lazar's first MLB stint came to an end Saturday, and he'll head back to Lehigh Valley having not allowed a run in 5.2 innings for the Phillies. His spot on the 26-man roster will go to Kolby Allard, who's being called up to make a spot start Sunday.