Deputies arrested a 23-year-old Manchester man for assault following an investigation at Eastview Mall.
Joseph Hobbs, 23, was charged with second-degree assault, resisting arrest, and harassment.
Deputies say Hobbs spit on them and threw a blunt object at a responding officer causing an injury to their head.
The deputy was treated at a hospital in Canandaigua.
The entire incident happened around 6:30 p.m. on Monday.
The charges will be answered at a later date.