Ulster stay unbeaten in pre-season campaign
Centre Ian Whitten crossed in the fifth minute, with Ian Humphreys converting, to give Ulster an early fillip. But a 20th-minute Willie Walker penalty put the hosts back in touch.
Lock Ryan Caldwell saw yellow on 28 minutes, but Ulster held Worcester – who included former Wallaby full-back Chris Latham and New Zealand hardman Greg Rawlinson in a strong line-up – at bay until the break.