Brent Yarina, Senior Editor, March 16, 2015

Former Wisconsin linebacker and 2013 Big Ten Defensive Player of the Year Chris Borland announced Monday night that he is retiring from the NFL over concerns about head trauma.

[ MORE: Read's story on Chris Borland's decision ]

Borland, fresh off a standout rookie season with the San Francisco 49ers, announced the decision on ESPN's Outside the Lines.

"I just honestly want to do what's best for my health," Borland told Outside the Lines. "From what I've researched and what I've experienced, I don't think it's worth the risk."

Borland, a third-round pick in the 2014 draft, registered 107 tackles, one sack and two interceptions as a rookie last season.

The Wisconsin family went to Twitter to tweet support to Borland.

h/t: @dave_heller