Since Dak Prescott was injured in the season opener, Dallas Cowboys owner Jerry Jones has remained optimistic that his quarterback would return sooner than originally estimated.

He now believes Prescott will be back on the field this Sunday against the Detroit Lions.

"Well, let's just say this: He's determined to [play]," Jones said during an interview with 105.3 The Fan on Tuesday. "I think he's, from my perspective, from what I can know and see, I think he's going to get there. We feel like that physically, he's at a position that the risk/reward justifies him being out there in terms of any reoccurrence of the injury."

Prescott was originally expected to be sidelined between six-and-eight weeks after suffering a fracture near his right thumb in the fourth quarter of a 19-3 loss to the Tampa Bay Buccaneers on September 11.

He began throwing again last week and coach Mike McCarthy said Monday that Prescott would be medically cleared to return to practice Wednesday.

"He’s going to be given every opportunity this week to go play," Jones said. "He looks ready to go."

Jones said Prescott had a "very impressive" throwing session prior to Sunday’s 26-17 loss to the Philadelphia Eagles, and afterwards said he was planning to return in Week 7.

Sunday’s defeat marked Dallas’ only setback since the season opener.

Cooper Rush led the Cowboys to four consecutive wins in place of Prescott, completing 61.9 per cent of his passes for 775 yards for an average of 7.4 yards per attempt with four touchdowns and no interceptions for a 97.1 passer rating.

He looked a bit shaky this past weekend, however, completing 47.4 per cent of his 38 attempts for 181 yards and an average of 4.8 yards per pass with a TD throw and three picks for a 37.3 rating.

Prescott, however, also struggled in Week 1, completing 48.3 per cent of his 29 attempts for 134 yards and an average of 4.6 yards per throw with one interception and a 47.2 rating.