Some traveling by this guard?

Cassell pegged for Boston by agent

Al Horford appears to get his money's worth on this foul of Paul Pierce (game-high 30 points) during the second half. (Matthew J. Lee/Globe Staff)

Sam Cassell was in his hometown of Baltimore yesterday, preparing to travel to Boston once he clears waivers tonight at 6. Soon thereafter, the point guard is expected to join former teammates Kevin Garnett and Ray Allen as the final piece of general manager Danny Ainge's extreme makeover of the Celtics.

Cassell's agent, David Falk, said yesterday he expects no last-minute surprises or new entries into the Sam Sweepstakes, such as, perhaps, Dallas owner Mark Cuban.

"We've talked to all the teams that expressed an interest in Sam and nothing is going to change," said Falk. "He's still going to sign with the Celtics. The only unknown is if some team claims him off waivers. But I consider that to be highly unlikely."

For a team to claim Cassell, it must have room to absorb what's remaining of his $6.15 million salary. He was waived last Thursday by the Clippers after the team negotiated a buyout.

One NBA source said that with Golden State under the salary cap, it conceivably could claim Cassell, but the source would be surprised if that happened.

Falk said Cassell is excited about being reunited with Garnett and Allen, with whom he made trips to the conference finals in 2004 (with Garnett in Minnesota) and 2001 (with Allen in Milwaukee).

"It's nice when people want you," Falk said. "I've told Danny that it was amazing how quickly those guys [Allen, Garnett, Paul Pierce] all jelled. I mean, this isn't fantasy basketball. And when you saw what needs they might have going forward, the only thing really left to do is to bring in a guy like Sam.

"If you look at this thing like a low-risk stock, Boston is a better fit. The West is much more difficult, while the East looks like a two-horse race."

Falk said Cassell's sore wrist, which sidelined him for the last few games as a Clipper, is still bothersome. But he added, "This is what he paid for [by taking the buyout], so he's going to play. We've been talking about this for a month. It's going to be great. He's so excited."

New Hawks guard Mike Bibby had a lot of battles with Cassell while playing for Sacramento. Before his team lost last night to the Celtics, 98-88, Bibby described Cassell as a "great player" but he was curious to how things will end up working out in Boston.

"He's a heady player," Bibby said. "He's smart. He can shoot the jump shot. He's played in big games. You always have to see how things fill out."

Brown debut delayed

Newcomer P.J. Brown did not make his Celtics debut and it's uncertain when he will. The 6-foot-11-inch, 239-pound forward/center signed with Boston Wednesday and coach Doc Rivers is in no rush to get him on the floor.

Brown acknowledged he is getting a little antsy, but he respects Rivers's decision and has said he still needs to get more familiar with the offense.

"[Rivers] just told me he wasn't ready to activate me yet," Brown, 38, said. "So we'll see. I think if I got out there I could do something. Physically I feel better than I thought I would. I knew it'd be a challenge. I'm coming along OK."

Said Rivers, "He's getting better. He'll be ready. I haven't been thinking about it, to be honest. It's not something that's pressing. We got 25 games [left], it's not like we have five or 10 games. He'll be ready when the time comes."

Remembering Bias

A documentary called "Len Bias" is expected to be completed by month's end, according May 3rd Films co-producer Kali McIver. Bias was the University of Maryland star who suffered a fatal drug overdose less than 48 hours after being the second overall player selected in the 1986 draft by the Celtics.

May 3rd Films was in Boston last week to do interviews for the documentary, which already includes ex-Maryland coach Lefty Driesell, ex-Georgetown coach John Thompson, and people who were in the room the night Bias overdosed. McIver said the documentary is expected to debut either on network television or in theaters in early fall.

"We think it's important to do the story because a lot of young people don't know the story," McIver said. "We want to tell the true story. It's important to educate and to show how his death is affecting lives today."

McIver said the Bias family gave its blessing. He added that Ainge and fellow ex-Celtics greats Larry Bird and Kevin McHale have turned down interview requests. Ex-Boston general manager Jan Volk was interviewed last week.

"[Ainge] said through a spokesman that he has come to peace with [Bias's death] and didn't want to talk about it," McIver said.

A trailer for the documentary can be viewed at www.len-bias.com.