The Dallas Mavericks don't believe that signing Chandler Parsons to a huge offer sheet will cost them a chance to keep Vince Carter.

A source said the Mavs are still optimistic about re-signing their sixth man. However, the three-year deal worth more than $45 million for Parsons would use the Mavs' remaining cap space if the Houston Rockets don't exercise their right to match the offer to the restricted free agent small forward.

The Mavs are hopeful Carter will agree to take the cap room exception of $2.73 million, the source said.

That's not the kind of offer the 37-year-old sixth man hoped to get after being a Mavs bargain the last three seasons, when he averaged a little more than $3 million per year. But Carter has made it clear that he'd prefer to continue playing in Dallas, and the Mavs have successfully convinced Dirk Nowitzki and Devin Harris to agree to re-sign on team-friendly terms.

The Mavs didn't enter free agency planning to pay $15 million per year to a small forward who wasn't a perennial All-Star. They had anticipated that their Plan B targets would top out in the $12 million range, but they went big in calling the Rockets' bluff on restricted free agent Parsons.