In the midst of a bounce-back season, J.D. Martinez is unsure about his future with the Boston Red Sox.

Martinez has an opt-out clause in his contract that would allow him to become a free agent this coming offseason.

"I'm right in the middle," Martinez said. "It's a balancing line, and I'm right in the middle. I haven't made a decision. I don't worry about that stuff, but right now I'm right in the middle."

Martinez, 34, has hit .285/.349/.516 (126 OPS+) with 27 home runs in his first 142 games this season.