 Monahan was traded to the Pittsburgh Penguins in 1977, and would be dealt again during the 1977–78 season to the Los Angeles Kings.After a season in the minors, he was claimed by the Quebec Nordiques in the 1979 NHL Expansion Draft, and was traded soon after to the St. Louis Blues, where he played until he retired following the 1980–81 NHL season

In 334 NHL games, he scored 61 goals and 80 assists.Hartland lives in Atlanta, GA, and is a retired manager for United Parcel Service.