How does this happen? Is the lesson to bet on on-base percentage once players hit their 30s? Or is this just an anomaly?Jamey CarrollSigning date: December 18, 2009Contract terms: Two years, $3.85 million ($1 million signing bonus, $1.05 million in 2010, $1.8 million in 2011), plus incentives for plate appearancesAge when signed: 35 years, eight monthsPerformance over previous two years: 206 games, 656 plate appearances, .355 on-base percentage, .343 slugging percentage, adjusted OPS of 89 (100 being average)Performance as a Dodger: 195 games, 656 plate appearances, .374 on-base percentage, .348 slugging percentage, adjusted OPS of 103Juan UribeSigning date: November 30, 2010 Contract terms: Three years, $21 million ($5 million in 2011, $8 million in 2012, $7 million in 2013, plus $1 milli