Sources: Rays, Kevin Kiermaier agree to 6-year extension

The Tampa Bay Rays have agreed on a six-year contract extension with center fielder Kevin Kiermaier, sources confirmed to ESPN's Jim Bowden.

News of the agreement was earlier reported by the Tampa Bay Times, which said the deal could be worth over $50 million.

Kiermaier, 26, hit .246 with 12 home runs and 37 RBIs last season for the Rays.

What he might lack in power, Kiermaier makes up for in with his defensive metrics. The winner of two consecutive Gold Gloves, Kiermaier led all center fielders last season with a defensive WAR of 3.0.