The option is worth $10 million and includes a $1-million buyout, per Passan.
Kepler can also earn up to $1 million in award bonuses, according to Jon Heyman of MLB Network.
*indicates club option
(Salary figures courtesy Jon Heyman of MLB Network)
Kepler owns a .233/.313/.417 slash line with 56 home runs and 190 RBIs over four seasons with the Twins. He was worth 2.6 WAR last season, according to FanGraphs, due to his above-average defense. Kepler recorded a plus-10 in defensive runs saved as an outfielder last year.
In 2009, the 26-year-old German inked the largest signing bonus ever given to a European-born player when he was awarded $800,000 at the age of 16.