Ben Roethlisberger is unsure if he will continue his career in 2017 and will consider retirement.

Roethlisberger will turn 35 in March and has missed time in each of the last two seasons with knee issues. Roethlisberger is under contract through 2020.

Mike Tomlin says Roethlisberger has mentioned possible retirement to the coaching staff at various points.

Tomlin says he's not alarmed by Roethlisberger questioning his future, adding Roethlisberger is "the most significant component of what we do."