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Grier completed 22 of 31 passes for 199 yards and two touchdowns with one interception in Saturday's 28-23 preseason loss to the Jaguars. He added 14 rushing yards on his lone carry.

The 28-year-old replaced Cooper Rush on the Cowboys' first possession of the second quarter and played the rest of the game, guiding the team to all its points in a 28-23 loss. Grier hit Jalen Tolbert for a 17-yard score just before halftime, then led a successful no-huddle drive late in the fourth that resulted in a 15-yard TD for John Stephens. Rush still holds down the No. 2 spot on the QB depth chart behind Dak Prescott, but Grier's impressive effort Saturday opens the door for a real battle between the two for the backup job.

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