A former TCU football standout who became a first-round NFL Draft pick has died. Jeff Gladney was killed in a car accident early Monday morning, his agent Brian Overstreet confirmed. Gladney was 25. “We are asking prayers for the family and privacy at this most difficult time,” Overstreet said. Several of Gladney’s former college teammates offered condolences on social media Monday. “Lost my Brother, my best friend, my right hand man… ain’t too much more I can take,” Jalen Reagor wrote on Twitter. “R.I.P Jeff Gladney, brother watch over me please.” TCU athletic director Jeremiah Donati release…