Thornton has consistently produced highlights with quarterback Patrick Mahomes while running routes along the sideline. Thornton's rise up the depth chart -- he was featured with the first-team offense throughout Wednesday's practice -- means he could have a rotational role in September.

Chiefs superstar quarterback Patrick Mahomes explains how he must step up after falling below his usual standard last season

Former Las Vegas Raiders coach Antonio Pierce was a special guest inside the Kansas City Chiefs' training camp in Missouri having previously made controversial comments about quarterback Patrick Mahom