The Phoenix actually started the game strongly, forcing a succession of corners without seriously testing Mariners goalkeeper Mark Birighitti. At the other end, Stefan Marinovic was practically a spectator in the early stages, but was called upon on the quarter-hour to beat away a fierce Simon drive.
Ball's dismissal changed the complexion of the game with Ulises Davila left to feed off scraps in the attacking third and the league-leading visitors exploiting their one-man advantage. Simon opened the scoring five minutes before halftime, latching onto a precise through-pass from Costa Rican attacker Marco Urena and finishing neatly past Marinovic.
The Mariners came close to doubling their lead just after the break with Josh Nisbet crashing a left-footed effort against the post. It mattered little, because shortly afterwards, Te Atawhai Hudson-Wihongi brought down Daniel De Silva in the penalty area, allowing Oliver Bozanic to beat Marinovic from the spot.
While Wellington stayed gamely in the contest and prevented any further scoring, they barely threatened Birighitti's goal, registering just a solitary shot on target in the entire match. The Mariners controlled proceedings and deservedly earned a sixth win of the season to remain at the top of the table.
Given their worryingly long injury list, there'll be a degree of relief in the Phoenix camp the mid-week clash away at Melbourne Victory has been postponed. Instead, Wellington will host Western Sydney next Sunday.
Central Coast Mariners 2 (Simon 40', Bozanic pen 50')
Wellington Phoenix 0