Rays outfielder Colby Rasmus has decided to "step away from baseball" and was placed on the restricted list, Tampa Bay announced on Thursday.

He is not expected to return to the team this season. The Rays did not give a reason for sudden departure, saying they are "respecting the privacy of Colby and his family."

Rasmus, 30, has been sidelined since mid June with discomfort in his surgically-repaired hip. He was batting .281 with nine home runs, 23 RBI and had a .896 on-base plus slugging percentage in 37 games this season for the Rays.

The Rays, 47-43, are in the thick of the American League playoff race. They are 3 1/2 games behind the Boston Red Sox in the AL East and currently hold the No. 2 wild card spot.

Rasmus, a nine-year veteran, signed a one-year, $5 million deal with the Rays in the offseason.

He played an instrumental role with the Houston Astros in the 2015 AL Division Series against the Kansas City Royals when he slugged three home runs in five games.