On 2 April 1984, he became a player-coach with the Fort Lauderdale Sun of the second division United Soccer League (USL). He returned to coach the team, now known as the South Florida Sun, during the 1985 season. However, the league collapsed six games into the season. In April 1986, he was hired to the independent Houston Dynamos. In the fall of 1986, Weller became an assistant coach with the Dallas Sidekicks of the Major Indoor Soccer League. He spent two seasons with the Sidekicks before becoming an assistant coach with the San Diego Sockers in October 1988. In December 1989, the Tacoma Stars hired Weller to replace the recently fired Alan Hinton as head coach. After the demise of the then named MSL in 1992, Weller did not coach again at the professional level until hire by the Sacramento Knights of the Continental Indoor Soccer League in January 1994. He remained with the Knights through the 1997 season.