1990s Joynt signed with
Oldham in April 1989, and made his first team debut a year later, in April 1990. In 1991, Joynt spent the English off-season in Australia, playing for NSW
Group 20 club, Yenda Blueheelers. After spending two years mostly in the 'A' team, he became a regular in the Oldham first team during the
1991–92 season. He played for the club in the
1991–92 Divisional Premiership final at the end of the season at
Old Trafford, but were defeated by
Sheffield Eagles. He was sold to
St Helens in September 1992 in exchange for Sean Devine, Paul Jones and a fee of £50,000. Joynt played at in
St Helens 4–5 defeat by
Wigan in the
1992–93 Lancashire Cup Final during the
1992–93 season at
Knowsley Road,
St Helens on Sunday 18 October 1992. Joynt won his first silverware later that season in the
1992–93 Premiership final, with St Helens this time winning 10–4 over Wigan. Joynt played left- in
St Helens' 16–25 defeat by
Wigan in the
1995–96 Regal Trophy Final during the
1995–96 at
Alfred McAlpine Stadium,
Huddersfield on Saturday 13 January 1996. Joynt played for
St Helens at in their
1996 Challenge Cup Final victory over
Bradford Bulls. He took over as captain of the club in 1997, and held the position until 2003. Joynt played for
St Helens at in their
1999 Super League Grand Final victory over
Bradford Bulls.
2000s Having won the 1999 Championship,
St. Helens contested in the
2000 World Club Challenge against
National Rugby League Premiers the
Melbourne Storm, with Joynt playing at in the loss. Joynt is probably best remembered as the scorer of the
Wide to West try in the Super League Final Eliminator in 2000, which won the match for St. Helens. He played at and scored two
tries in the subsequent
2000 Super League Grand Final victory over the
Wigan Warriors, and being awarded the
Harry Sunderland Trophy. As
Super League V champions, St. Helens played against
2000 NRL Premiers, the
Brisbane Broncos in the
2001 World Club Challenge. Joynt was the
captain, played as a and scored a
try in St. Helens' victory. In 2002, Joynt was at the centre of controversy when he seemingly performed a '
voluntary tackle' with seconds remaining in the
2002 Super League Grand Final. St. Helens had just kicked a
drop-goal to take a one-point lead in the match, and the penalty from the voluntary tackle would have given the
Bradford Bulls a chance to kick at goal and win the match. However, the referee dismissed wild protests from the Bradford Bulls players and the final hooter went, with St. Helens winning 19–18. Having won
Super League VI, St. Helens contested the
2003 World Club Challenge against 2002 NRL Premiers, the
Sydney Roosters. Joynt captained St. Helens as a in their 0-38 defeat. Joynt relinquished captaincy of St. Helens to
Paul Sculthorpe at the end of 2003's
Super League VIII, and retired from rugby league following the 2004's
Super League IX. ==International career==