Pittsburgh Steelers linebacker James Harrison is mulling retirement following his $75,000 fine from the National Football League.

"I'm going to sit down and have a serious conversation with my coach tomorrow and see if I can actually play by NFL rules and still be effective," Harrison said on Tony Bruno's FOX Sports Radio show on Tuesday night. "If not, I may have to give up playing football."

After meeting with head coach Mike Tomlin this morning, the Steelers have excused Harrison from today's meetings and practices, the team announced on Wednesday.

Harrison is in the second year of a six-year, $51.175 million contract extension that included $10 million signing bonus, as well as over $6 million in roster/reporting bonuses and base salary the last two seasons. Harrison is scheduled to earn $22.62 million in base salaries over the final four years of his deal.