London Fletcher

49ers linebacker Chris Borland shocks NFL with decision to retire after one season

Chris Borland's decision to retire due to health concerns after one successful rookie season triggered shockwaves around the NFL.

The San Francisco 49ers inside linebacker told ESPN that he's retiring after he researched the connection between playing football and neurodegenerative diseases.

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