Before ...
Justin Morneau's career took off in his AL MVP season of 2006 at the age of 25. From Opening Day of 2006 to the day he suffered his concussion in Toronto he was putting up Hall-of-Fame-like numbers:
Totals: 693 games
.298 batting average
.372 on-base percentage
.528 slugging percentage
.900 OPS
136 home runs