He reached the quarterfinals of the U.S. National Championships in 1950 at Forest Hills, New York, on grass, losing to Dick Savitt.

Schwartz won two Eastern Clay Court Championships in 1951 and again in 1962 where he defeated Herb Fitzgibbon in the final in four sets.

Schwartz won the New York State Championships in 1956 and again in 1962, where he defeated Fitzgibbon in the final in three straight sets.

Schwartz competed in the 1961 Maccabiah Games in Israel, losing in the third round to Israeli Eleazar Davidman.

[2] Schwartz played his final tournament at the Long Island Championships at Great Neck, New York in 1968.