Dowd appeared in visible discomfort as the match at the The Hawthorns neared half-time and he subsequently failed to reappear for the second period, apparently injured.
Graham Scott was called into action to take over with the whistle having originally started the match on the touchline.
Dowd was at the centre of attention earlier this season when Chelsea manager Jose Mourinho reportedly questioned his fitness following his side's 5-3 defeat to Tottenham on New Year's Day.
Get the best features, fun and footballing frolics straight to your inbox every week.
Thank you for signing up to Four Four Two. You will receive a verification email shortly.
There was a problem. Please refresh the page and try again.