Arizona Cardinals rookie Tyrann Mathieu takes his helmet off during practice in the 100-degree heat at the Cardinals training facility on Tuesday, May 14, 2013, in Tempe, Ariz. (AP Photo/Ross D. Franklin)
Arizona Cardinals rookie Tyrann Mathieu takes his helmet off during practice in the 100-degree heat at the Cardinals training facility on Tuesday, May 14, 2013, in Tempe, Ariz. (AP Photo/Ross D. Franklin)
