Sam Bradford made the trip to London but didn't make it to the team's first workout.

The Vikings quarterback didn't take part in practice Thursday as he continues to rehab from a knee injury.

According to the Minneapolis Star Tribune, Thursday's workout in southwest London was just a walk-through because of unfavorable field conditions. While it's encouraging that Bradford traveled with the team, his availability remains in question after he also missed practice Wednesday.

Bradford led Minnesota to victory over the Saints in Week 1 before missing the team’s second, third and fourth games. He then started Week 5 against the Bears but was pulled at halftime.