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WASHINGTON (AP) - Davey Johnson is ready to soak it all in during what is supposed to be his final season as manager of the Washington Nationals, saying he'll throw batting practice or even take pregame grounders occasionally.

What he isn't prepared to do is say for certain that he will retire after 2013.

Speaking before Washington's opening day game against the Miami Marlins on Monday, Johnson says: "I don't know what lies in store for me. I have no idea."

At 70, he is the oldest skipper in the majors. He was the NL Manager of the Year last season, when Washington won the NL East.

The Nationals announced Nov. 10 that this would be Johnson's last year as their manager and that he'll move into a role as a consultant to the club in 2014.