Restricted free-agent forward Chandler Parsons is finalizing a three-year, $46 million offer sheet with the Dallas Mavericks, league sources told Yahoo Sports.

Parsons can officially sign the sheet at 12:01 a.m. Thursday. The Houston Rockets will have three days to match.

The Rockets and Parsons negotiated throughout the day, but were unable to come to an agreement on a deal, sources said.

It is unclear whether the Rockets will match the offer, but Houston general manager Daryl Morey has had conversations with the agents for the three best unrestricted free agent forwards: Luol Deng, Trevor Ariza and Paul Pierce, sources said.