By many accounts, Chris Colasanti, a four star recruit out of Leonard, MI, was a bit of a disappointment at Penn State--but that's only likely because of our lofty, unrealistically high standards at the linebacker position. Colasanti was the first commit of the 2007 class, and was one of only two members of that class to play as a true freshman his first year in the program.
Colasanti was a solid player throughout his four years at Penn State, eventually making his way up a depth chart that included NaVorro Bowman and Sean Lee. He started his senior year at middle linebacker (after playing in 11 games his junior year), logging 112 tackles (39 solo) and 8.5 tackles for loss. After leaving PSU, he spent some time with the Colts organization.
Most importantly, though, and why no one should consider Colasanti a disappointment--he graduated from Penn State in four years as an Academic All-American and three-time Academic All-Big Ten selection, and left the program with realistic aspirations to become an orthopedic surgeon.
That's success, by any measure.