Carlos Carrasco has been diagnosed with a blood condition and "is stepping away from baseball activities to explore the optimal treatment and recovery options," the Cleveland Indians have announced.

Carrasco had been feeling lethargic for several weeks and the club said details of his illness "will be conveyed at Carlos and his family's discretion."

The right-hander signed a four-year, $47 million contract in December.

"He had been feeling sluggish, and because he's had some heart issues in the past, he had some blood tests that led to this conclusion," Terry Francona said, referring to a non-invasive surgery Carrasco underwent for an irregular heartbeat in October 2014.