The Indians announced Thursday that outfielder Michael Brantley underwent right ankle surgery. Brantley will need four to five months of rehab before he can resume full baseball activities.

The surgery was performed Wednesday in Charlotte, N.C. Dr. Robert Anderson performed the arthroscopic procedure to strengthen ligaments in Brantley's ankle. Brantley was on the disabled list twice with right ankle problems during the regular season.

Brantley's ankle surgery puts in question whether the Indians will exercise their $11 million on the left-handed hitting outfielder for 2018. It's believed the team has already been trying to renegotiate a deal with Brantley.

The option includes a $1 million buyout.

If the Indians don't exercise Brantley's option, he will become a free agent. The Indians have until three days after the final game of the World Series to exercise Brantley's extension, which seems unlikely at this point.

They could let him become a free agent and then try to re-sign him. Or they could work out a new deal with Brantley before that date.