Raiders TE Clive Walford injured his knee in an ATV crash earlier this offseason, according to Fox Sports. We don't have any details on the injury, but Walford reportedly underwent surgery and will miss spring workouts. He's expected back sometime during training camp, possibly for the start of it. "May not be as bad as originally thought," a source says. We'll keep an eye on Walford's status over the next few months. The 2015 3rd-rounder had a promising finish to his rookie campaign, hauling in 15 balls for 178 yards over his final 5 games.