The National Professional Soccer League (NPSL) was a North American professional soccer league that existed for only the 1967 season before merging with the United Soccer Association (USA) to form the North American Soccer League. It had ten charter members, nine from the United States and one from Canada. To encourage attacking play, the NPSL introduced a new standings points system that was later used by the NASL – 6 points for a win, 3 for a draw, 0 for a loss and 1 bonus point for each of the first three goals scored. The circuit's commissioner was Ken Macker, an American publisher of three Philippines-based newspapers. The name National Professional Soccer League was revived in 1990 and used by a United States professional indoor soccer league.

In 1966 a group of sports entrepreneurs led by Bill Cox and Robert Hermann formed a consortium called the North American Professional Soccer League with the intention of forming a professional soccer league in United States and Canada. However, this was just one of three groups with similar plans. The NAPSL eventually merged with one of these groups, the National Soccer League, led by Richard Millen, to form the National Professional Soccer League. A third group, the United Soccer Association was sanctioned by both the USSFA and FIFA. The NPSL did not receive sanctioning by the USSFA as they refused to pay the $25,000 fee,^[1] was branded an outlawed entity by FIFA, and players faced penalties for signing with it. Despite this the NPSL, which secured a TV contract from CBS, set about recruiting players, and announced it would be ready to launch in 1967.

The NPSL kicked off on Sunday, April 16 with a full slate of five matches attended by a total of 46,547 fans. The largest crowd of the day was found in Philadelphia, where 14,163 cheered the hometown Spartans to a 2–0 victory over the Toronto Falcons.^[2] The most notable game however, was Baltimore's 1–0 home victory over Atlanta in front of a crowd of just 8,434. It was televised by CBS which had signed a two-year contract to broadcast a game every Sunday afternoon live and in color. Play-by-play voice Jack Whitaker was joined by the former Northern Ireland international Danny Blanchflower as a pundit. Blanchflower was not impressed with the standard of play and did not hesitate to say so.^[3]

The NPSL was also criticised after Pittsburgh's 2–1 triumph over Toronto in the Falcons' home opener on Sunday, May 14. Of the twenty-one fouls that afternoon, eleven were called to allow CBS to insert commercials into its telecast. Referee Peter Rhodes also admitted that he had forced players to fake injuries to serve the same purpose. This raised many questions about whether the television networks and its sponsors were having too much influence over televised sporting events.

The NPSL did however attract some notable players including three former Aston Villa players Phil Woosnam, Vic Crowe and Peter McParland who, together with another veteran of the English League, Ron Newman, all turned out for the Atlanta Chiefs. Two ex-Real Madrid players, Juan Santisteban and Yanko Daucik, also turned out for the Baltimore Bays and Toronto Falcons respectively. Santisteban made the NPSL All-Star team and Daucik finished as the league's top scorer.

The Oakland Clippers laid claim to the regular season title boasting both the best record and the most total points in either division. In the NPSL Finals the Western Division champion Clippers defeated the Bays, winners of the Eastern Division for the NPSL Championship by virtue of a 4–2 aggregate. Dennis Viollet gave Baltimore a 1–0 win on Sunday, September 3, before a home crowd of 16,619. Six days later, in the second leg at Oakland, Dragan Đukić scored a hat trick as the Clippers won 4–1 in front of 9,037.

On the same day as the second leg of the NPSL final, the St. Louis Stars defeated Philadelphia, 2–1, in a battle of division runner-ups held in St. Louis before a crowd of 9,565. The victory gave the Stars a berth in the Commissioner's Cup versus Oakland.^[4] On September 18, the Clippers completed the NPSL treble, by defeating the Stars for the Commissioner's Cup in front of 8,415 fans at Busch Memorial Stadium by the score of 6–3.^[5]

P= Played, W = Wins, L = Losses, T= Ties GF = Goals For, GA = Goals Against, Pts= point system

6 points for a win, 3 points for a tie, 0 points for a loss, 1 point for each goal scored up to three per game.

 -Premiers (most points).  -Other playoff team.

GP = Games Played, G = Goals (worth 2 points), A = Assists (worth 1 point), Pts = Points

^[6]

Baltimore Bays v Oakland Clippers

September 3, 1967 First leg	Baltimore Bays	1–0	Oakland Clippers	Memorial Stadium, Baltimore, Maryland
2:15 PM EDT	Dennis Viollet 71:41' (Santisteban)	Report 1 Report 2		Attendance: 16,619 Referee: Walter Crossley (England)[citation needed]

Oakland Clippers^[9] v Baltimore Bays

September 9, 1967 Second leg	Oakland Clippers[9]	4–1	Baltimore Bays	Oakland-Alameda Coliseum, Oakland, California
12:45 PDT	Dragan Djukic 27' (Davidovic) Dragan Djukic 35' (Davidovic) Dragan Djukic 38' (pen.) Edgar Marín (Mitic) 58'	Report 1 Report 2	Juan Santisteban  38' Guy Saint-Vil 41' (Asher Welch)	Attendance: 9,037 Referee: Mike Ashkenazi

1967 NPSL Champions: Oakland Clippers

The Commissioner's Cup was a one-off challenge match between the NPSL Champion and the winner of a third-place match between the two division runners-up. On September 9 the St. Louis Stars defeated the Philadelphia Spartans 2–1 to secure their place in the match. Earlier that same day the Oakland Clippers were crowned NPSL champions with a, 4–2, two-match aggregate victory over the Baltimore Bays to claim the other cup spot.^[10]

St. Louis Stars v Oakland Clippers

September 18, 1967 Cup match	St. Louis Stars	3–6	Oakland Clippers	Busch Memorial Stadium, St. Louis, Missouri
7:30 PM CDT	Norb Pogrezba 36' Bora Kostić , (pen.)	Report	Joe Fuhrman 10' (o.g.) Edgar Marín 25', 51' George Lievano 28' Ilija Mitić 40' Sele Milosević 80'	Attendance: 8,415 Referee: Emmett Brennan

• Most Valuable Player: Rubén Navarro, Philadelphia^[11]
• Rookie of the year: Willy Roy, Chicago

In December 1967, the NPSL merged with the United Soccer Association to form the North American Soccer League. As a result of the merger several of the original NPSL franchises folded or relocated. This was partly to avoid some cities having two teams. Philadelphia Spartans and Pittsburgh Phantoms both folded, while Chicago Spurs became Kansas City Spurs and Los Angeles Toros became San Diego Toros. Together with New York Generals, Baltimore Bays, Atlanta Chiefs, Toronto Falcons, St. Louis Stars and Oakland Clippers, these teams then became founding members of the NASL. However, only Atlanta Chiefs, who won the inaugural NASL title, and St. Louis Stars enjoyed any longevity. The remaining franchises all folded by 1970.