Dirk Nowitzki and Devean George each sparked crucial rallies with consecutive 3-pointers, helping the Dallas Mavericks overcome 45 points by Tracy McGrady in a 109-96 victory over the Houston Rockets on Tuesday night. McGrady scored 21 points in the first quarter and had 29 at halftime. He made a 3-pointer that put Houston up 65-52 midway through the third quarter, but it couldn't last.