The undrafted player who I feel can have a big impact in the NFL, would have to be Mark Herzlich....

Source: http://www.bcinterruption.com/2011/5/5/2156015/the-undrafted-player-who-i-feel-can-have-a-big-impact-in-the-nfl

Mark Cullen Baltimore Orioles Boston Red Sox Chicago White Sox Cleveland Indians Detroit Tigers