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I think he is. Upton's 09 would be A-Gones 2nd best season, and he didn't even play the full year. At the same age, A-Gone was putting up a 821 OPS in AAA.
A-Gone's 09 was a career year, and his '10 inflated by luck. He had a high IBB and BABIP. I think hes a true talent 4 WAR player, but his potential is not in the Upton-class. Upton has the talent to be one the best players in baseball.
I really think Adrian Gonzalez is becoming overrated. Hes a very good player, but hes not a star (either than '09).