The last time Garrett Gilbert started a game at quarterback, he filled in for an injured Dak Prescott last November against the Pittsburgh Steelers.

Back in Oxnard, Prescott gave an update on his shoulder muscle strain at halftime of the Cowboys' preseason opener.

Don't miss any of the action with our daily updates: news, notes and more throughout the Cowboys' regular season and offseason. 

He didn't specify a timeline, but Jerry Jones confirmed Thursday night that Jimmy Johnson will be part of the Cowboys' Ring of Honor.

While we know about 20 guys who won't be playing Thursday, that still leaves us with 70 who should get some action. Here are the 8 guys we're watching closely.

Here are five of the most important storylines for each team heading into Thursday night's preseason opener.

A total of 16 Cowboys players will not be making the cross-country trip for Thursday's preseason opener.

The Cowboys open the NFL's 2021 preseason schedule with a 16-3 loss to the Steelers in the annual Hall of Fame Game.

Watch the highlights from the Hall of Fame Game matchup between the Dallas Cowboys and the Pittsburgh Steelers during the 2021 NFL season.

Dallas Cowboys wide receiver Brennan Eagles muscles down the sideline for 25 yards with a defensive back hanging onto his shirt.

Dallas Cowboys quarterback Ben DiNucci shows his wheels on a winding fourth-and-19 scramble.

Dallas Cowboys quarterback Ben DiNucci delivers a fading sideline pass to open wide receiver Aaron Parker for 36 yards.

Dallas Cowboys quarterback Garrett Gilbert's 21-yard laser to wide receiver Cedrick Wilson is longest play of first quarter.

Dallas Cowboys quarterback Garrett Gilbert's dart to running back Rico Dowdle gets Cowboys to 5-yard line.

Dallas Cowboys rookie linebacker Micah Parsons scoops up a fumbled exchange for an early turnover.