Sargent was drafted by the
Los Angeles Kings with the 48th pick in the
1974 NHL Entry Draft and joined the Kings in 1975 after excelling for the United States national hockey team in the 1973
Ice Hockey World Championship and
1974 World Junior Ice Hockey Championships tournament, where he was voted most valuable defenseman. He was named the Kings' outstanding newcomer after his rookie year. He was also a US team member at the inaugural
1976 Canada Cup tournament and was voted the Kings defenseman of the year in 1976-77. In the 1977–78 season, Sargent tallied 54 points, and had a plus/minus of plus 18 on a team that was minus 2 for the season. However, the Kings failed to re-sign Sargent and he became a free agent. In the summer of 1978, Sargent signed with his native
Minnesota North Stars as a restricted free agent when his contract with the Kings ended. Minnesota had to give up three players to Los Angeles (
Rick Hampton,
Steve Jensen and
Dave Gardner) as compensation, but Sargent quickly became one of his new team's most important defensemen in 1978–79, being on the ice for a league-record 53.1 percent of his team's goals that season. Sargent was selected for the 1980
NHL All-Star game (in Los Angeles) but was unable to participate due to persistent back and knee problems which eventually forced him to retire prematurely in 1983 after missing most of the previous three seasons. ==Post career==