LOUISVILLE — Muhammad Ali was back in the hospital Thursday for follow-up care related to a severe urinary tract infection, his second stint in the hospital in the last four weeks. The three-time former heavyweight boxing champion was admitted to an undisclosed hospital earlier this week, Ali family spokesman Bob Gunnell said Thursday. Ali was in stable condition. Ali was hospitalized on Dec. 20 with what was initially believed to be a mild case of pneumonia. Doctors later determined Ali had a urinary tract infection, not pneumonia, Gunnell said. Ali was expected to be released Friday. Ali turns 73 Saturday and hopes to spend it at one of his homes with family, Gunnell said. — AP