Fox was able to use his skill and speed to crack the Los Angeles lineup for the 1980-81 season and finished his rookie campaign with a respectable 18 goals and 42 points for a strong Kings team which finished with a 43-24-13 record under head coach Bob Berry.

Fox played a critical role in the tying goal during the stunning Miracle on Manchester game against Edmonton in the 1982 playoffs, by stripping scoring superstar Wayne Gretzky of the puck in the dying moments of the third period before sending it to defenseman Mark Hardy whose point shot was blocked but pounced on by Steve Bozek who swatted the puck past Oilers goaltender Grant Fuhr to even the score at 5-5 after Los Angeles had trailed 5-0 after two periods.

His final NHL goal was scored in St. Louis on October 21, 1989, against Blues goaltender Greg Millen.

Since the 2023-24 NHL Season, Fox has worked with long-time Kings radio announcer Nick Nickson in what is now a television/radio simulcast.

However, due to their longstanding popularity in Southern California, the Kings had them recorded their calls of potential Cup-clinching games in 2012 and 2014 for future distribution.