Redskins running back Clinton Portis hinted on Tuesday that the concussion that ended his 2009 season might cut his career short. "If it's my time," Portis said in a radio interview. "I think I had a great career." Washington placed Portis on the injured reserve Tuesday because of lingering problems stemming from a concussion last month. "I think I'll get well. I think I have to go and really put the time into rehabbing and continuing to do what the doctors say," Portis said during his weekly appearance on "The John Thompson Show" on ESPN 980 Tuesday. "But at the same time, man, to have the opportunity to play for eight years and play, compete and not miss many games and to carry the organization, I'm thankful for Mr. [Daniel] Snyder and Coach [Joe] Gibbs bringing me to the Redskins and the Broncos drafting me. "If it's my time and I look back today, I think I have had a great career."