Since the age of 9 he has trained with Clarkson about 40 days a year.[2] His father, David Sills IV, played one year for the Virginia Military Institute.[2] Sills began playing pee wee football at age six.[3]

In Summer 2009, Sills was among the 7th grade youth quarterbacks at the Debartolo Sports University in Las Vegas, with the likes of 7th grade Randall Cunningham, Jr. and several other notable performers.[4] Kiffin offered Sills a scholarship in 2010.[5] On February 5, 2010, Sills made a verbal commitment to attend University of Southern California even though he is ineligible to sign a letter of intent until 2015.[6] Kiffin heard about Sills via a popular YouTube video that Clarkson recommended and had not actually met him personally at the time of his verbal commitment.[6][7] Clarkson coordinated the communication of the scholarship offer to keep its execution within the National Collegiate Athletic Association (NCAA) bylaws.[8] The commitment that Sills has made is non-binding, which allows him to decommit and pursue another program.[3] Sills is among the youngest football players to ever receive a scholarship offer from a major football program.[9] Sills' commitment brought about numerous responses from sources such as ESPN calling into question NCAA recruiting policies on youth athletes.[10][11]

In February 2011, there were rumors that the Auburn Tigers football team had made him a scholarship offer. The rumors turned out to be unfounded.[12] Sills flew from Delaware to California to observe USC spring practice in March 2011.[13]

At age thirteen, Sills, a seventh-grader from Bear, Delaware, is nearly 6 feet (1.83 m) tall.[14] Scouts mention his youth athletic prowess in the same breath with Tiger Woods and LeBron James.[15] Sills is the starting quarterback for Red Lion Christian Academy, which is a school for grades K-12 in Bear.[6] By 2007, Sports Illustrated had already hailed him as one of the greatest prospects ever,[16] and Bloomberg News described him as the "best arm money can buy".[17] Sills uses National Football League video footage to learn quarterbacking skills.[18] At Red Lion in 2010, he accumulated 1,355 passing yards and nine touchdowns against five interceptions in eight games.[13] Midway through his high school freshman season in 2011, Rivals.com described him as follows: "Plays beyond his years and has all the tools already to be a great one."[19]

(http://www.autoadmit.com/thread.php?thread_id=2025328&forum_id=2:#21353512)

He has never eaten a Big Mac or an Oreo or a Ding Dong. When he went to birthday parties as a kid, he would take his own cake and ice cream to avoid sugar and refined white flour. He would eat homemade catsup, prepared with honey. He did consume beef but not the kind injected with hormones. He ate only unprocessed dairy products. He teethed on frozen kidney and liver. When Todd was one month old, Marv was already working on his son's physical conditioning. He stretched his hamstrings. Pushups were next. Marv invented a game in which Todd would try to lift a medicine ball onto a kitchen counter. Marv also put him on a balance beam. Both activities grew easier when Todd learned to walk. There was a football in Todd's crib from day one. "Not a real NFL ball," says Marv. "That would be sick; it was a stuffed ball."[2]

(http://www.autoadmit.com/thread.php?thread_id=2025328&forum_id=2:#21353792)