Cowboys backup quarterback Kellen Moore had another sub-par performance Saturday night against the Colts, reportedly raising concerns in the team's front office.

Clarence Hill Jr. of the Fort Worth Star-Telegram reported Saturday that a team source said Moore will be a "subject of conversation at personnel meetings this week."

The Cowboys are obviously set with Dak Prescott as the starter at QB, but the 29-year-old Moore, who has thrown only 104 passes in parts of two NFL seasons, is still unproven as a backup option. He's completed 18 of 38 passes for 200 yards in the first two preseason games, including 10-21 for 131 yards in Saturday's 24-19 win over the Colts, but lost a fumble that was returned for a touchdown.

Meanwhile, undrafted rookie Cooper Rush has looked impressive thus far, going 17 of 20 for 196 yards and a touchdown.

Following the game, coach Jason Garrett and owner Jerry Jones were both supportive of Moore, although Jones also praised Rush.

“I’m just glad to see Rush taking advantage of his opportunities out there,” Jones said, via the Star-Telegram. “Wouldn’t want to get ahead of ourselves in any way here. And the other thing is that we still have a lot of confidence in 17 (Moore), his ability to be able to get in there when we would call on him with the personnel around him and get the ball in the right places.