VIDEO: Former NFL receiver Greg Jennings on specialization, keeping your focus and more

Sep 28, 2014; Minneapolis, MN, USA; Minnesota Vikings wide receiver Greg Jennings (15) catches a pass for 29 yards against the Atlanta Falcons in the first quarter at TCF Bank Stadium. Mandatory Credit: Bruce Kluckhohn-USA TODAY Sports ORG XMIT: USATSI-180116 ORIG FILE ID: 20140928_gma_sk1_068.jpg

Minnesota Vikings wide receiver Greg Jennings, shown in 2014, was a three-sport star in high school (Photo: Bruce Kluckhohn, USA TODAY Sports)

Former NFL wide receiver Greg Jennings was all-conference in three sports at Kalamazoo Central in Michigan.

He was obviously a football star, ranked among the top players in Michigan; he won the state title in the long jump; and he was seventh in the voting for Mr. Basketball in the state as a senior.

While football became his career in 10 seasons with the Green Bay Packers, Minnesota Vikings and Miami Dolphins, Jennings has advice for players and parents on the current climate of sports specialization, the lessons he learned and how athletes can maintain their focus on the field.