The big centre-back finds himself stuck on the sidelines just at a time when the relegation-haunted Dragons need him most.
Evans' problems also compound the centre-back issues Toshack is facing with Wales ahead of next month's Euro 2008 qualifier against the Republic of Ireland at Croke Park.
Toshack's first-choice pair of James Collins and Danny Gabbidon have been hit by injury and are still some way of making West Ham's first team.
And, while Evans has stepped into the breach and done well in Wales' last two matches, his sudden suspension means he will not play again before Toshack's team travel to Dublin.
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