Career
As an unknown quantity, Marcus was not expected to progress far. However, he beat Dennis Taylor and Maurice Parkin to set up a last-16 meeting with Gary. Gary held Marcus to 5–5 at one point, but could not prevent him from pulling away to reach the quarter-final with a 15–8 victory.
There, Marcus faced Ray Reardon, but having recovered from 3–9 to 7–9, was eventually defeated 11–15.
Owen next reached a quarter-final at the 1982 Welsh Professional Championship, which was itself an eight-man event. He lost his first match 0–6 to Cliff Wilson.
Owen had no further success in the professional game, his last match being a 0–6 loss to Tony Chappel in the first round of the 1985 edition of the Welsh Professional Championship. Having held 17th place in the inaugural world rankings in 1976, he had not occupied a position on the list since 1980.