Ron Washington has surprisingly resigned as manager of the Texas Rangers.

"Today, I have submitted my resignation from the job I love - managing the Rangers -- in order to devote my full attention to addressing an off-the-field personal matter," Washington said in a statement.

"As painful as it is, stepping away from the game is what's best for me and my family.

"This is in no way related to the disappointing performance of the team this season. We were already discussing 2015 and looking forward to getting the Rangers back to postseason contention."

The Rangers, plagued by injuries this season, have the worst record in baseball at 53-87.

Tim Bogar will be the interim manager for the remainder of the season.

In 2009, Washington tested positive for cocaine and was subjected to random drug testing. Washington begged for forgiveness and even offered to resign but then-team president Nolan Ryan stuck with him.