Vikings' Antone Exum maturing into player he needs, Zimmer says

Vikings rookie safety Antone Exum adjusts his helmet May 16, 2014, during rookie minicamp at Winter Park in Eden Prairie. (Photo by Hannah Foslien/Getty Images)Aug 2:

MANKATO, Minn.-- Antone Exum's confidence long has been evident. While at Virginia Tech, he recorded a rap song with the verse, "I'm the best corner in the country and you know it.''

Exum is now a safety, having been moved from cornerback last year as a Vikings rookie. As for his confidence, he realizes he perhaps has needed to tone things down a bit.

When Minnesota coach Mike Zimmer recently was asked about Exum, he said he has improved as a player and with his maturity. He said he needed to have several talks with Exum when he…