Dallas Cowboys quarterback Cooper Rush (10) is expected to get at least one more start. Jayne Kamin-Oncea-USA TODAY Sports

Shannon Sharpe: 'Winning has masked just how poorly Cooper Rush has been playing'

The Dallas Cowboys are flying high right now, winners of four straight games despite losing starting quarterback Dak Prescott to a thumb injury in Week 1. Whether the victories have come primarily thanks to solid coaching , elite defensive play or something else, FS1's "Undisputed" co-host Shannon Sharpe doesn't think the victories have been due to the performance of backup signal-caller Cooper Rush.

Fellow co-host Skip Bayless disagreed with Sharpe's assessment of what Rush has done over the past month.

While Prescott continues to make progress in his recovery, Rush is expected to get at least one more start . Week 6 may be his biggest test yet, as the Cowboys will travel to face the NFC-leading (and NFL's only undefeated team) in the 5-0 Philadelphia Eagles for "Sunday Night Football."

Head coach Mike McCarthy said Friday morning that Prescott did a bit more throwing than was scheduled on Thursday and is in "regeneration" mode. McCarthy added that the two-time Pro Bowler will throw more ahead of Sunday night's contest.

Rush has thrown for four touchdowns this season, while recording zero interceptions and zero turnovers.

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