The agent for Houston Rockets restricted free-agent power forward Donatas Motiejunas expressed some concern with the team about a lack of progress on a new contract.

"They haven't made us a serious offer," Motiejunas' agent, BJ Armstong, told ESPN on Wednesday. "Our moment of truth will be Oct. 1. We'll make a decision on that day."

The Rockets, who don't comment publicly regarding pending player contracts, made a $3.4 million qualifying offer this summer. Armstrong indicated if a deal isn't done, Motiejunas may not sign the qualifying offer. Motiejunas, who started in 22 of 37 total games last season, has met with new coach Mike D'Antoni and was told he would have a significant role with the team.

Motiejunas' start for the 2015-16 season was delayed because he was recovering from back surgery. At the trade deadline, the Rockets traded him to the Detroit Pistons, but the deal was later rejected because Motiejunas failed his physical due to back issues.

However, Motiejunas played well for the Rockets after the trade was recorded, averaging 6.2 points and 2.9 rebounds per game.

The previous season, a healthy Motiejunas set career highs in points per game (12) and minutes per game (28.7).

As a "stretch four," Motiejunas has value with the Rockets.

Yet with training camp scheduled to start Sept. 24, it's somewhat surprising a deal hasn't been completed for his services.

"There's only so much we can do based on the current CBA," Armstrong said, alluding to the fact Motiejunas is a restricted free agent and outside of getting an offer from another team, which the Rockets can match, he's in limbo. "I'm not frustrated -- this is what it is. We'll know where the Rockets stand by [Oct. 1]. All deals get done in the 11th hour."