Question: Griffey was born in Donora, Pennsylvania, on November 21, 1969. (He shares a birthday with another Donora native and Hall-of-Famer, Stan Musial.) His family moved to Cincinnati, Ohio, where his father, Ken Griffey Sr., played for the Cincinnati Reds, when Ken Jr. was six years old. Ken Jr. was in the clubhouse during his father's back-to-back championships in the 1975 and 1976 World Series.

As a free agent, Griffey was courted by the Mariners and the Atlanta Braves. The national media was dubious about Griffey's declining skills, with The Washington Post noting "...the Mariners are not about to sign Griffey for baseball reasons; they're bringing him back to Seattle to sell tickets." Griffey ultimately accepted a contract offer from the Mariners on February 18, 2009, after "agonizing" over the decision. Griffey indicated he was motivated by sentimental reasons toward Seattle, where he received an overwhelmingly positive reception when he last played there as a Cincinnati Red in June 2007, but was inclined towards the Braves for its proximity to his home in Orlando, Florida, and his desire to be with his family during the season. Apparently, Griffey was very close to signing with the Braves; however, a premature report emerged from The Atlanta Journal-Constitution that an Atlanta deal was done and a conversation with Willie Mays and his own 13-year-old daughter played a factor in his choice. Griffey once again sported #24 with the Mariners; the team had not issued the number to any player or coach in the nine years between his two stints in Seattle.  Griffey went 1-2 with a home run in his regular season debut against the Minnesota Twins. The home run was Griffey's eighth Opening Day home run; as of 2013, he is tied with Frank Robinson and Adam Dunn for first place in this category. On April 15, 2009, Griffey hit his 400th home run as a Mariner (613th of career), off Los Angeles Angels pitcher Jered Weaver, becoming the first MLB player to hit 400 home runs with one club (Mariners) and 200 home runs with another (Reds). AP stated, "Griffey returned to the Mariners in 2009 and almost single-handedly transformed what had been a fractured, bickering clubhouse with his leadership, energy and constant pranks."  On June 23, 2009, at Safeco Field, Griffey hit the 5,000th home run in franchise history, off San Diego Padres pitcher Chad Gaudin. This was Griffey's 619th career home run. On September 1, Griffey hit career home run #621 at the new Yankee Stadium, off Yankees pitcher Andy Pettitte in the sixth inning. It marked the 44th different ballpark in which he had hit a home run. On August 12, 2009, against his former team, the Chicago White Sox, he hit an RBI single in the bottom of the 14th inning to win the game, 1-0, for the Mariners.  Griffey returned to the Mariners for the 2010 campaign with a similar contract to that of 2009, but struggled offensively over the first two months while posting a .184 batting average. On April 27, Griffey passed Andre Dawson for 45th on the career hit list. On May 20, 2010, in a game against the Toronto Blue Jays, Griffey hit an RBI single off Blue Jays' closer Kevin Gregg to win the game, 4-3, for the Mariners. After starting the ninth inning trailing 3-1, the Mariners rallied in the bottom of the ninth to load the bases on two singles and a walk, then tied the game via a walk and a sacrifice fly. The walk-off single was the final hit and RBI of Griffey's Major League Baseball career, and moved him past Rafael Palmeiro to 14th on the all-time RBI list.

Using a quote from the above article, answer the following question: who was his coach?
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Problem: Leonardo, nicknamed Leo, is a fictional character and one of the four main characters in Teenage Mutant Ninja Turtles comics and all related media. He is often depicted wearing a blue eye mask. His signature weapons are two katanas. Leonardo is the most serious, the most spiritual, the most disciplined, and the most in-line with Splinter's teachings and thoughts, and is the leader of the Turtles.

In Teenage Mutant Ninja Turtles, Leonardo was fairly modest and sensitive, rarely issuing direct commands and seemingly much more relaxed around his brothers thinking of himself as more of an equal than a leader. It was he who first communicated telepathically with a kidnapped Splinter and seems the most anxious about Raphael's health after his ambush by the Foot Clan. He fought alongside his brothers against The Shredder in the climatic battle and was the only one of the four to actually injure The Shredder, but, like his brothers, could not defeat him. Due to the focus on Raphael in the film's plot, Leonardo's personality was rarely explored and his leader position in the team took a back seat. Leonardo was portrayed by David Forman and voiced by Brian Tochi.  In The Secret of the Ooze, Leonardo was much more prominent and his leader position was brought to focus. He is seen on many occasions bickering with Raphael as their sibling rivalry begins to become much more serious. He, like his brothers, was astonished at the return of the Foot but he found that their current homelessness due to their last battle was a more pressing issue and soon he convinced his brothers that they needed to move. Leonardo is once again sensitive, caring, and humorous in this adaption but he now appears much more bossy and controlling.  In Teenage Mutant Ninja Turtles III, after traveling back in time to feudal Japan, Leonardo leads his brothers to help a village in trouble from the villainous weapons trader, Walker, and to return home.

why did he and his brothers fight shredder?

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