What Illinois singer's music has been featured on a show that stars Tyler Posey as a teenager named Scott McCall?
William Fitzsimmons (musician): William Fitzsimmons (born 1978) is an American singer-songwriter, based in Illinois, perhaps best known for his songs "Passion Play" and "Please Don't Go", which aired during pivotal scenes in ABC's medical drama "Grey's Anatomy". William Fitzsimmons (musician):  In addition to the above, his music has also been featured on ABC's "Brothers & Sisters" and Grey's Anatomy spin-off "Private Practice", MTV's "Life of Ryan" and "Teen Wolf", The CW's "One Tree Hill", CBS's "Blue Bloods", ABC Family's "Greek", Lifetime's "Army Wives", and USA Network's "Burn Notice", and he has been given reference in "Billboard", "Rolling Stone", "Paste", "Spin", "Musikexpress", "Uncut", "Q Magazine", and "Performing Songwriter Magazine". Teen Wolf (2011 TV series):  It is loosely based on the 1985 film of the same name, and stars Tyler Posey as a teenager named Scott McCall, who is bitten by a werewolf and must cope with how it affects his life and the lives of those closest to him, and Dylan O'Brien as "Stiles" Stilinski, Scott's best friend.
William Fitzsimmons