BEREA, Ohio -- Tyrod Taylor has been cleared from the concussion protocol and was back out on the practice field Thursday, but he might not be ready to back up Baker Mayfield Sunday vs. the Raiders.

Taylor was limited in practice not only from coming off the concussion but because of a back injury suffered during the 21-17 victory over the Jets, and the Browns are leaving Friday for Oakland. At this point, the Browns are preparing Drew Stanton to step in for Mayfield if he gets hurt.

"We will see exactly where that's at,'' said Jackson. "(Taylor) didn't do a lot so I'll make sure that if we do put him out there, that he's ready to go. I'll know more about that tomorrow."

He said he'll make his decision before the team flies to Oakland at 2 p.m., and that the long flight and the earlier travel day will all factor into the decision on whether or not Taylor will even make the trip.

"What's important is for our team to know exactly where we are at backup quarterback (before the trip),'' said Jackson.

Stanton, Mayfield's designated mentor, went 3-1 for the Cardinals last season, improving his career record to 11-6.

"He has insight I haven't seen from very many guys,'' said offensive coordinator Todd Haley, referring to Stanton's mentorship. "He's been tremendous. He's a unique, unique quarterback.

Jackson admitted that Taylor's back injury is factoring into the decision, but didn't know if it occurred on the same hit that caused the concussion.

"He got hit more than once in that game,'' said Jackson. "Not sure exactly which one, but I know that it was one of those, I'm sure, that led to the back issues."

In fact, Haley attributed Taylor's poor performance in the Jets game (4-of-14 for 19 yards, 39.6 rating) to the fact he was hit on five of the first six plays because of mental errors.

"It can't take our guys a quarter and a half to settle in,'' Haley said. "It was not a fair situation.''

Taylor showed up in the Browns locker room near the end of the media availability, but politely declined to talk, saying he had to get to a meeting.

Jackson made it clear on Monday that he wants Taylor around despite the fact he lost his starting job that day to Mayfield, who rallied the Browns from a 14-point second-quarter deficit after Taylor got knocked out of the game with the concussion.

"He's going to be right here,'' Jackson said Monday. "He's not going anywhere. That's important. Part of Baker being able to play like he did was because of Tyrod and Drew. I don't want to upset that room that way. I don't think there's any reason to.

"Tyrod is going to be needed. He's the backup quarterback on this team if he's healthy, and he's played. His teammates know who he is and how he goes about the rhythm of his game. It's always good to have that kind of depth at that position, especially if we're traveling down this road, which we are."

In other Browns injury news, safety Damarious Randall was on the bike again today with his heel injury, and linebacker James Burgess was absent again with his knee injury.