Sunderland left-back George McCartney has signed an extension to stay with Leeds until the end of 2010. The 29-year-old will now stay at Elland Road for a third month. The Northern Irishman has been a regular in the Leeds side during his time in Yorkshire and made his 12th consecutive appearance for the Whites in Saturday's goalless draw at Reading. McCartney told United's official website: "I'm here until the end of the month now. I wanted to come here and get back playing. We were a bit up and down at the start but we're on a roll now. We're more solid at the back."