Inducted as a truly great player, Lockwood was a high school All-American who won a state championship at West Genesee (N.Y.) High School in 1990, before becoming a four-time collegiate All-American as a midfielder at Syracuse University. He earned first team honors in 1992, second team honors in 1993 and 1994, and third team status in 1991. Additionally, he was selected to the All-NCAA Tournament team in both 1992 and 1993, and helped lead Syracuse to the 1993 NCAA title. He also played in the USILA’s North-South All-Star Game as a senior in 1994, and was named Syracuse University's "Athlete of the Year" that year.
Lockwood was a two-time member of the U.S. Men’s National Team and helped lead Team USA to the gold medal at the 1994 and 1998 world championships. As a post-collegiate player, he competed as a member of the Reebok Lacrosse Club for three seasons and earned All-Club honors in 1996 and 1997.