John Hartson then sent in a powerful header but Marshall was right behind it.
Marshall again did well to race from his goal and block at the feet of Hartson.
And Cadete, Roy Keane, John Hartson and Andy Walker scored for the team of veterans.
Hartson, however, believes the club can compete with big-spending clubs in England on occasion.
Bellamy, 25, will now link up with Wales international team-mate John Hartson in a revamped Celtic attack.
BBC: SPORT | Football | My Club | Celtic | Celtic complete Bellamy loan deal
Hartson then squandered an opportunity to stretch Celtic's lead, heading a Thompson cross over from close range.
Celtic clinched their fourth league title in six seasons thanks to John Hartson's early goal against Hearts.
BBC: Strachan celebrates his side clinching the championship
Swansea-born former Wales striker Hartson says financial constraints could turn those dreams into a nightmare on the field.
"I have very been fortunate to play in Europe for big clubs like Arsenal and Celtic, " said Hartson.
Swansea-born Hartson, 34, was diagnosed with testicular cancer that has spread to his brain about three weeks ago.
Meanwhile, Jan Vennegoor of Hesselink has been an able replacement for John Hartson.
BBC: SPORT | Football | My Club | Celtic | Celtic's title relief
Hartson admitted the arrival of Wales international strike partner Craig Bellamy on loan from Newcastle has helped his cause.
BBC: SPORT | Football | Scottish Premier | Hartson and Ricksen share award
Hartson has scored 28 goals to lead Celtic to the brink of the Bank of Scotland Premier League title.
BBC: SPORT | Football | Scottish Premier | Hartson and Ricksen share award
Hughes left the Scottish Cup finalists to take over at SPL rivals Hibernian and Hartson is vying for the job.
And the veteran ex-Celtic keeper made a first class save to stop Hartson's close range half-volley as Celtic poured forward.
Ex-Celtic and Wales striker Hartson has been diagnosed with the disease, which has also spread to his brain and lungs.
Boruc was quoted in Polish newspapers as saying that John Hartson was lazy and Roy Keane acted like a star.
BBC: SPORT | Football | My Club | Celtic | Strachan plays down Boruc remarks
Since being diagnosed with testicular cancer Hartson has had surgery to relieve pressure on his brain and is undergoing radiotherapy treatment.
And Rush has joined Brian Flynn, John Hartson, Chris Coleman and Lawrie Sanchez in publicly declaring his interest in the job.
Joshua Hartson, who has since left the Army because of a serious injury, recalled a conversation he had with 1st Sgt.
Since his retirement as a player, Hartson has proved himself an articulate and knowledgeable football commentator for media outlets, including the BBC.
His day was complete when Shaun Fagan and James McFadden scored late goals and Celtic could not add to John Hartson's consolation.
Williams follows the likes of Ryan Giggs, Mark Hughes, John Hartson, Neville Southall and Craig Bellamy who have won the top award.
"It's been well documented that Cardiff have been struggling financially, " said Hartson.
Hartson and other soldiers interviewed by CNN said Hatley was frustrated by the Army's rules for evidence required to hold Iraqi detainees.
Hartson also believes there is more pressure on the Bluebirds to gain promotion than their Welsh rivals, simply because of Cardiff's financial troubles.
Hartson would dearly have loved a goal to celebrate winning his 50th cap, but it was not to be for the Celtic striker.
BBC: SPORT | Football | Internationals | Wales 2-0 Azerbaijan
Robert Douglas, Sutton, Lambert, Stilian Petrov and Sylla came in, with Hartson, Jonathan Gould, Jackie McNamara, Alan Thompson and Didier Agathe dropping out.
Hartson seemed destined to move into football management and has been linked with vacant posts at the likes of Falkirk, Swansea and East Stirlingshire.
Former Wales striker Hartson had been due to commentate for the BBC at Swansea's Liberty Stadium but pulled out because he was so upset.
应用推荐