Glennon has struggled at times in his two preseason starts. He threw an interception in each game and is 15 for 26 for 109 yards and one touchdown.
Glennon called Trubisky's situation out of his control.
The third preseason game is usually a dress rehearsal for the season opener, and the Bears will play the first half at Tennessee with Mike Glennon at quarterback.
Trubisky took snaps with the Bears' first string in practice Wednesday and coach John Fox said the second pick of the 2017 draft will play with the starters to begin the second half of Sunday's third preseason game.
LAKE FOREST, Ill. (AP) — Whether it's part of the Chicago Bears' grand plan or the result of dramatic improvement, rookie quarterback Mitchell Trubisky's development has accelerated.
NOTES: Running back Ka'Deem Carey underwent wrist surgery and will be out six weeks, according to Fox. The wrist was bothering Carey in Saturday's 24-23 win over Arizona. ... Cornerback Prince Amukamara (hamstring) and defensive end Akiem Hicks (achilles) returned to practice Wednesday after sitting out last week's game. ... Tackle Charles Leno Jr. received a four-year contract extension. The 2014 seventh-round draft pick from Boise State became a starter at left tackle in 2015.
Fox continued to stress Glennon is the opening day starter, and the team's plan is to get a better read on Trubisky because he may not have many more opportunities to play.
In Tampa, Glennon started until Jameis Winston was drafted. The Bears signed Glennon in free agency,Cheap Nike Air Max 90 Essential, then made a stunning draft-day trade to move up and take Trubisky with the second overall pick.
The Bears have said since the selection of Trubisky that Glennon is their opening day starter.
"And so we've kind of felt this all along, and we won't do it in the fourth game because our starters don't play much — if at all — in that game."
Fox refused to go as far as saying Trubisky might have a chance to start as a rookie.
In two preseason games, Trubisky is 24 of 33 for 226 yards and two touchdowns with a passer rating of 111.4.
"I don't like doing hypotheticals," Fox said. "Right now Mike Glennon's the starter; he's going to start preseason Game 3, which is usually a pretty good indicator where you start the season."
However,Deion Jones Falcons Jersey UK, Glennon will not play into the second half, as the Bears have often done with the starter in the second half of the third preseason game. And Trubisky will play ahead of second-string quarterback Mark Sanchez with the starters.
"Right now,Wholesale Jerseys, Mark Sanchez is still the backup but we've seen nine (NFL) years of Mark," Fox said. "We've not been able to see that with Mitch, and he needs that experience.
"Outside of that, it just doesn't do you any good to worry about other things,Cheap Adidas NHL Jerseys," Glennon said. "Just any of that. All I can do is prepare for Tennessee and treat it just like anything else."
"It was clear to me that nothing has changed as far as the depth chart," Glennon said. "Mitch is getting one rep (series) with the starters."
"I would say I've shown them what I can do," Trubisky said. "I think I've progressed faster than they expected I would, but I've still got a long ways to go and I know that.
"I mean, d?j? vu," Glennon said. "Again, it's situations that I've been through before that I handled myself well in the past, and I'll continue to do that in this situation."

Still,NFL Jerseys Authentic, Trubisky's play has created a stir in Chicago.
"Just to get a true evaluation; that's what we're trying to do and trying to do it at all positions, not just the quarterback position," Fox said. "That'd be the biggest reason."
Fox said the hope is Trubisky gets to play against Tennessee's starters when he enters the game.
"But I think I've shown that I've earned these reps and I just need to continue to get better each day."
For Glennon, the quarterback derby is a familiar one.