After playing with the Charlotte Checkers of the ECHL and the Hartford Wolfpack of the American Hockey League, he was signed as a free agent by the Phoenix Coyotes on July 19, 2007.

On October 18, 2009, he was traded to the Boston Bruins along with prospect Alexander Fallstrom and a second round draft pick in 2011 in exchange for Chuck Kobasew.

[4] On March 3, 2010, Weller was traded from the Bruins to the Florida Panthers along with Byron Bitz and a second round draft pick in exchange for Dennis Seidenberg and Matt Bartkowski.

[citation needed] With Weller on board, the Devils embarked on 22-game unbeaten streak, breaking the league and world records.

However, the Devils narrowly missed out on the league title, finishing level on points with the Sheffield Steelers but having won 1 regulation game less, before being beaten in the Playoff final 5–4 to the Nottingham Panthers.