Texas Rangers pitcher Corey Kluber's season has been paused before it even truly began.

The club announced on Monday that an MRI on the two-time Cy Young Award winner's pitching shoulder revealed a Grade 2 tear of the teres major muscle.

The 34-year-old Kluber will be shut down from throwing for a minimum of four weeks and placed on the injured list.

Making his Rangers debut against the Colorado Rockies on Sunday after an offseason trade from Cleveland, Kluber lasted only a single inning after tightness in his shoulder prevented him from carrying on. The Rangers would go on to use six different relievers en route to a 6-2 loss.

The team is next in action on Tuesday when they visit the Arizona Diamondbacks. The Rangers (1-2) have not made a corresponding roster move.