When the San Francisco 49ers released cornerback Chris Cook on Wednesday, it was something of a surprise. Cook had just signed a one-year deal with the team this offseason, so cutting him created $800,000 in dead money, per Over the Cap. It’s not like he played poorly last season, either—while a hamstring injury limited him to just six active games, he was solid as a dime corner in those games. He also succeeded last preseason—he was PFF’s highest-graded 49er during 2014’s preseason, allowing only one reception and having two interceptions.