Barr, a two-time Michigan state champion, is projected to compete for the Nittany Lions at either 174 or 184 pounds once he arrives in Happy Valley.
While competing for Central Michigan, Hildebrandt became a two-time All-American, a three-time NCAA Championships qualifier, and a two-time MAC champion at 125 pounds.
Brooks is now 6-0 overall on the season with two pins and two major decisions under his belt.
Davis is expected to wrestle at 125 or 133 pounds, which is certainly good news for Penn State.
The Nittany Lions remain unbeaten on the season with an impressive victory over a talented Arizona State group.
The Nittany Lions finished their night 2-0 in Niceville, Fla.