Surprised you didn't know, it wasn't a secret.
Ginn played for his father, Ted Ginn, Sr., in high school at Glenville High School in Cleveland, Ohio, where he played defensive back, quarterback and wide receiver. Ginn, Jr. was selected as the 2004 USA Today Defensive Player of the Year, a 2004 Parade All-American, and named the 2004 SuperPrep National Defensive Player of the Year. He also participated in the U.S. Army All-American Bowl as a member of the East team, along with former Dolphins teammates Ryan Baker and Chad Henne, and was named the Most Valuable Player of the game.
Ginn intercepted eight passes as a senior, returning five of them for touchdowns. One of his interception returns went for a state-record 102-yard touchdown, while another went for a 98-yard score.
2005 Spring Game quote:
The surprise of the day was Ted Ginn Jr. getting some time at cornerback, especially in the Red Zone. He played about 5-6 plays at CB, and I don't believe he had more than one pass thrown in his area. After the game Coach Tressel was quoted as saying "That's something he has the capability of doing. One way or another, we're going to get comfortable at that position." Ginn or no Ginn, I'm comfortable based on what I saw yesterday
Somewhere there is a quote from Ted Ginn, Sr which said something link [sic] "Coach Tressel is not getting his money's worth, as Ted Jr. was is an excellent cornerback."