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 Carroll

Signing date: December 18, 2009
Contract terms: Two years, $3.85 million ($1 million signing bonus, $1.05 million in 2010, $1.8 million in 2011), plus incentives for plate appearances
Age when signed: 35 years, eight months
Performance 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 103

Juan Uribe

Signing date: November 30, 2010
Contract terms: Three years, $21 million ($5 million in 2011, $8 million in 2012, $7 million in 2013, plus $1 million in 2014)
Age when signed: 31 years, four months
Performance over previous two years: 270 games, 1,007 plate appearances, .318 on-base percentage, .464 slugging percentage, adjusted OPS of 106
Performance as a Dodger: 46 games, 177 plate appearances, .282 on-base percentage, .319 slugging percentage, adjusted OPS of 70

Contract information source: Cot’s Baseball Contracts