49ers' Isaiah Winstead signs with team despite social media push.

The San Francisco 49ers signed undrafted rookie Isaiah Winstead to their 90-man offseason roster, despite rumors that social media influenced the decision. General Manager John Lynch clarified that the team's personnel department knew about Winstead all along and decided to sign him. Winstead caught 88 passes for 1,085 yards and six touchdowns last season at East Carolina and joins a group of wide receivers that already includes Deebo Samuel, Brandon Aiyuk, and Jauan Jennings.