NFL Network's Rich Eisen prepares to run the 40-yard dash during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Johnny Vy/NFL)

NFL Network's Mike Mayock prepares to time NFL Network's Rich Eisen (not pictured) to run the 40-yard dash during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Johnny Vy/NFL)

NFL Network's Rich Eisen runs the 40-yard dash during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Johnny Vy/NFL)

NFL Network's Rich Eisen runs the 40-yard dash during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Ben Liebenberg/NFL)

NFL Network's Rich Eisen runs the 40-yard dash during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Johnny Vy/NFL)

NFL Network's Rich Eisen runs the 40-yard dash during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Johnny Vy/NFL)

NFL Network's Rich Eisen runs the 40-yard dash during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Johnny Vy/NFL)

NFL Network's Rich Eisen (center) walks to NFL Network's Mike Mayock (right) to hear his 40-yard dash time during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Ben Liebenberg/NFL)

Mike Mayock (left) shares NFL Network's Rich Eisen time after Eisen ran the 40-yard dash time during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Ben Liebenberg/NFL)

Mike Mayock (left) and NFL Network's Rich Eisen walk together after Eisen ran the 40-yard dash during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Ben Liebenberg/NFL)

NFL Network's Rich Eisen (right) talks with Zara Schwer, a St. Jude's Hospital patient, after running the 40-yard dash during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Ben Liebenberg/NFL)

NFL Network's Rich Eisen (right) hands Zara Schwer, a St. Jude's Hospital patient, her shoes after running the 40-yard dash during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Ben Liebenberg/NFL)

NFL Network's Rich Eisen (right) signs his shoes for Zara Schwer, a St. Jude's Hospital patient, after running the 40-yard dash during the 2015 NFL Scouting Combine at Lucas Oil Stadium on Sunday, February 22, 2015 in Indianapolis, Indiana. Eisen teamed up with St. Jude Children's Research Hospital to help raise money for charity. (Ben Liebenberg/NFL)