Who to watch for Penn State : Nittany Lions star tailback Saquon Barkley left last week 's 45 - 12 win over Michigan State with a right ankle injury .
Star tailback 's expected to play against Wisconsin .
Who to watch for Penn State : Nittany Lions star tailback Saquon Barkley left last week 's 45 - 12 win over Michigan State with a right ankle injury , but he 's expected to play against Wisconsin .