Doug Petrie starred in Dr. Horrible's Sing-Along Blog.
Justin Christopher Blalock -LRB- born December 20 , 1983 -RRB- is a former American football offensive guard .. American football. American football. offensive guard. offensive guard. He played college football for the University of Texas , and earned All-American honors .. Texas. Texas Longhorns football. All-American. All-American. college football. college football. University of Texas. University of Texas at Austin. The Atlanta Falcons chose him in the second round of the 2007 NFL Draft .. Atlanta Falcons. Atlanta Falcons. 2007 NFL Draft. 2007 NFL Draft. Blalock officially retired from football in 2015 .. He spent his entire eight-year NFL career with the Atlanta Falcons .. Atlanta Falcons. Atlanta Falcons