Burdi was not available to pitch in Monday's extra-inning loss to Milwaukee, DK Pittsburgh Sports reports.
"Coming off the injuries he has and what he's done, we're going to be careful in terms of his usage going forward," manager Derek Shelton said. Burdi threw 11 pitches Sunday. Relievers Michael Feliz and Kyle Crick surrendered four ninth-inning runs Monday night while Pittsburgh rested Burdi.