The New York Yankees' seven-year, $153 million contract with Jacoby Ellsbury, the second-best free agent available this offseason, seems shocking for its sheer size and for the fact that the Yankees already had a viable center fielder (Brett Gardner) on their roster.

But if Ellsbury can stay healthy even for most of the deal, it's actually quite reasonable, especially for a team on the verge of playoff status with the game's biggest revenue base.

Ellsbury has been good when he's been able to get and stay on the field, with an 8-WAR season in 2011 when he should have won the AL MVP award and a 5.8 WAR season (per both versions of the stat) in 2013.