BOSTON (AP) Boston Red Sox designated hitter David Ortiz is planning to retire after the 2016 season.

The Dominican slugger said in a video posted on The Players' Tribune on Wednesday (http://bit.ly/1WYZJxo ) that he will play one more season. It was Ortiz's 40th birthday, and the post was titled ''40.''

Ortiz's plans were first reported by Fox Sports.

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Ortiz led the Red Sox to three championships, hitting 503 homers in a career full of clutch at-bats while in the process establishing himself as the face of a long-downtrodden franchise that rose to become a big-market bully.

In the video, Ortiz says the time has come to move on to the next chapter in his life.

Ortiz batted .688 in the 2013 World Series against the St. Louis Cardinals and was named the Series MVP. But his greatest contribution to the team's success came in the 2004 playoffs, when Boston ended its 86-year dynasty of disappointment.

Big Papi, as his teammates and Boston fans came to call him, had consecutive game-ending hits in extra innings of Games 4 and 5 of the AL championship series against the Yankees as the Red Sox became the first major league team to overcome a 0-3 deficit in a best-of-seven postseason series. The Red Sox went on to sweep St. Louis in the World Series for their first title since 1918.

Ortiz stuck around for two more titles - the only member of the '04 team that was still around in 2013, when he had 11 hits in the first five games before the Cardinals walked him four times in the clincher.

After playing six semi-productive seasons with the Minnesota Twins, who released him after the 2002 season, Ortiz came to Boston as an unknown platoon first baseman, found a spot at designated hitter and emerged as one of the best sluggers in baseball history.

In all, he enters his final season with a .284 average, 2,303 hits, 584 doubles and 1,641 RBIs. In 82 postseason games, including nine with the Twins, he batted .295 with 17 homers and 60 RBIs.

His 445 with the Red Sox is the third-most in franchise history behind Ted Williams' 521 and the 452 hit by Carl Yastrzemski. He is 27th on baseball's career homer list, one behind Eddie Murray.

The 447 homers he hit while in the lineup as a DH is the most since the position was established in 1973. He was been named the AL's designated hitter of the year a record seven times, surpassing the five won by Edgar Martinez, for whom the award is named.