Derek Parkin played in 609 games (including 501 in the Football League, a club record) between 1968 and 1982 and is the holder of the club appearance record. He played 50 or more competitive matches in a season for Wolves no fewer than five times (another record), in seasons 1968-69 and 1969-70 he took part in every single league and cup match played by the club. He signed from Huddersfield Town and made his debut for Wolves in a 2-0 defeat at Newcastle Utd in February 1968. He was ever present in seasons 1968-69 and 1969-70 and appeared in 116 consecutive league games from his debut.
He won League Cup Winners medals in 1974 and 1980 and won a Division 2 Championship medal in 1976-77. Parkin's consistency led to his winning five England Under-23 caps as well as playing for the Football League, but full England honours never came his way.
In 1972-73 he was forced to miss over half the season by a mystery illness which at the time was diagnosed as a heart attack. Thankfully he returned to full fitness and played in the Wolves side for another nine seasons. In March 1982, he joined Stoke City for £40,000 and took his total of League appearances for his three clubs to 602, but retired at the end of the 1982-83 season.

Derek Parkin Statistics
Many Thanks to Björn Persson for supplying the Stats and Pictures

For Huddersfield:
1964-67 60+1 Goals: 1

League Games for Huddersfield:
60+1 Goals: 1

For Wolves:
1967-68
League games: 15 Goals: 1 FA Cup: - League Cup: -

1968-69
League games: 42 Goals: 0 FA Cup: 2 League Cup: 3

1969-70
League games: 42 Goals: 1 FA Cup: 1 League Cup: 3 (+ Anglo-Italian Cup: Games 4)

1970-71
League games: 39 Goals: 0 FA Cup: 2 League Cup: 1 (+ Texaco Cup: Games: 7 Goals:1 -Final)

1971-72
League games: 32 Goals: 2 FA Cup: 2 League Cup: 1 Goals: 1 (+UEFA Cup Games: 7 -but missed final)

1972-73
League games: 18 Goals: 0 FA Cup: 3 League Cup: 0 (+ Watney Cup Games: 1)

1973-74
League games: 39 Goals: 0 FA Cup: 0 League Cup: 6 -Won the final! (+ UEFA Cup Games: 4)

1974-75
League games: 41 Goals: 2 FA Cup: 1 League Cup: 1 (UEFA Cup: Games: 2)

1975-76
League games: 30 Goals: 0 FA Cup: 6 League Cup: 3 

1976-77
League games: 42 Goals: 0 FA Cup: 5 League Cup: 1 Goals: 1

1977-78
League games: 38 Goals: 0 FA Cup: 3 League Cup: 1

1978-79
League games: 42 Goals: 0 FA Cup: 7 League Cup: 1

1979-80
League games: 40 Goals: 0 FA Cup: 3 League Cup: 11 -Won the final!

1980-81
League games: 19+1 Goals: 0 FA Cup: 6+1 Goals: 1 League Cup: 1 (+UEFA Cup: Games: 2)

1981-82
League games: 21 Goals: 0 FA Cup: 1 League Cup: 2

League Games for Wolves: 500+1 Goals: 6

For Stoke:
1981-82
League games: 10 Goals: 0 FA Cup: - League Cup: -
1982-83
League games: 30 Goals: 0 FA Cup: 3 League Cup: 1
League Games for Stoke: 40 

He played his last league game 12/3-83 in a game between Stoke and Sunderland! Stoke lost 0-1 and he was substituted by a young Steve Bould.