My Mariners friend sent this to me. Enjoy. Carlos Zambrano is underrated Well, underrated in sabremetric circles, anyway. I know what you're all going to say too. He had a 4.17 tRA last year - above average, sure, but worth nothing close to the $18+ million dollars the Cubs spent on him. In fact, his pitching WAR (tRA based, not FIP), was 3.3, which would value him at around around $15 million. An overpay, then? Only if all you do is look at pitching statistics. Zambrano's true value was actually more than $20M. How? Hitting.