Three Nittany Lions will advance to their first championship appearances.
All 10 wrestlers secured bonus point victories, including four pins.
"He's an incredibly valuable piece of what we are doing here."
Mesenbrink is one of six undefeated Penn State wrestlers in the lineup.
Barlett notched wins over Iowa's Real Woods and Rutgers' Max Hermes.
Three Penn State wrestlers achieved bonus point victories, including two pins.