Leon Blake and Liam Daly were brought into the fray to attempt to inject some life into an insipid Evesham display.
Simon Fitter's free-kick that ballooned into the netting behind the goal summed up United's night and Steve Lutz was equally sloppy when given a free header that he could only direct into the ground and into the arms of Willenhall keeper Dean Coleman.
Daniel Lennon's frustration earned him the first yellow card of the night for dissent after 74 minutes leaving the home side just 16 to rescue something from the game.
James Fox suddenly came alive and his cross picked out Owen whose control let him down in front of goal.
The striker then saw a shot parried by Coleman and Lucan Spittle's challenge prevented Fox sliding the ball into an empty net.
The Willenhall keeper then blocked Fox's volley and Lutz just failed to force in the rebound.
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