Houston's Dikembe Mutombo, 42, was carried away on a stretcher in the first quarter of the Rockets' 107-103 loss to the Portland Trail Blazers with what he said was a career-ending left knee injury. "I have to go out with my head high and not be disappointed and have no regrets. I have so many things I can be so thankful for over my 18 years," said Mutombo.