The Browns don't believe starting quarterback Tyrod Taylor's left hand injury is serious but they'll proceed with caution with a little more than two weeks until the season opener.
Taylor, who fell awkwardly out of bounds in Thursday's preseason win over the Eagles, returned to action for a few series following a brief visit to the team's locker room.
"I was very concerned," Jackson said postgame. "Anytime your starting quarterback goes into the locker room, you're not sure, but he came back ... We'll continue to look at it and see where we are as we head into next week."
Taylor landed on his left hand trying to scramble left on a fourth-and-1 near the end zone with 6:13 to play in the first quarter. He was taken by team personnel to the locker room where Jackson said X-ray results came back negative on the hand.
Jackson suggested the Browns will continue to examine Taylor's hand in the coming days and could see that the quarterback needed both hands to deliver handoffs after returning to action.
"I was aware of it, but obviously our medical people said he was fine and he could be out there," Jackson said. "We wouldn't have put him back out there if he wasn't. Again we'll check everything tonight and see where he is, but hopefully everything will be OK."
Taylor, who played all but two series with the team's first-team offense in the first half, finished with 65 yards passing on 11-of-16 attempts.
His understudy, rookie Baker Mayfield, said Taylor's return to the field speaks volumes about his veteran teammate.
"That's who he is. He's a competitor. He wants to be out there," said Mayfield, who passed for 76 yards and an interception on 8-of-12 throws. "He's the same way that I am in regards to that. He wants to be out there and playing with his guys."
Taylor, a Pro Bowler in 2015, was traded to the Browns following three seasons in Buffalo. He was named the team's starting quarterback March 15.