Hawks unsure how much time Horford will miss
Horford, who missed most of 2011-12 with a torn left pectoral muscle, was injured in the first overtime Friday night in a victory at Cleveland and likely will need surgery soon.
Budenholzer started 15th-year veteran Elton Brand at center Saturday night against Charlotte. Pero Antic and Gustavo Ayon also will get plenty of playing time.
When Horford was hurt two seasons ago, he was sidelined 55 games after undergoing surgery. He returned for the last three playoff games of Atlanta's first-round loss to Boston.
Horford leads the Hawks in scoring and rebounding, averaging 18.2 points and 8.4 rebounds.