Dre Greenlaw returned an interception for a touchdown to help the San Francisco 49ers score 17 points over two-plus minutes late in the first half, and they barely held on for a 41-33 win over the Detroit Lions on Sunday.

Dre Greenlaw returned an interception for a touchdown to help the San Francisco 49ers score 17 points over two-plus minutes late in the first half, and they barely held on for a 41-33 win over the Detroit Lions on Sunday.