by FOXSports.com

Boldin, in a long contract dispute with the team, informed the NFL Players Association in a letter that he wanted to replace the agent. The players association says it received the letter on Friday, so with the required five-day waiting period, Boldin can sign with a new agent on Thursday.

Boldin is expected to sign with Creative Arts Agency (CAA), a source told FOXSports.com's Alex Marvez.

Rosenhaus issued a statement saying he has "great respect" for Boldin.

"I'm hopeful we can work things out and he will return to the Rosenhaus Sports family in the near future," Rosenhaus said.

Boldin has been looking for a trade out of Arizona for a full year now. He first asked to be traded last offseason when the Cardinals refused to give him a contract extension. After the team failed to move him, Boldin caught 89 passes for 1,038 yards and 11 touchdowns in the 2008 season, earning him his third Pro Bowl selection.

Boldin sat out minicamp with what he said was a sore hamstring. He has not participated in any of the Cardinals' voluntary workouts the last two weeks.

Quarterback Kurt Warner has been outspoken in his desire to get Boldin back with the team.

"Maybe Anquan felt that there was a sticking point there and that this is going to free some things up and allow them to have a different approach coming forward and work better with the Cardinals," Warner said after the workout on Tuesday. "I really don't know. I don't want to speculate on the reasons behind it all but I think I've had hope from day one that they can get something done."

Boldin has been represented by Rosenhaus since being drafted out of Florida State in the second round by Arizona in 2003. He signed a four-year, $22.75 million extension with Arizona in August of 2006, a deal that keeps him under contract through the 2010 campaign. He has a base salary of about $2.75 million next season and $3 million in 2010.

Linebacker Karlos Dansby, who also has an unsettled contract situation, said for Boldin to part from an agent who has represented him his entire career is "huge for him."

"Hopefully the ball will get bouncing and hopefully he'll be back out here on the field and be comfortable that his situation will get handled," Dansby said.

Boldin has renewed his request for a trade this offseason, and last month Cardinals head coach Ken Whisenhunt confirmed that teams had been contacting Arizona about Boldin's availability.

Information from The Associated Press was used in this report.