(Reuters) - Colorado Rapids midfielder Sam Cronin and his Philadelphia Union counterpart Brian Carroll traded late goals as the Major League Soccer conference leaders ground out a 1-1 draw on Saturday. Cronin appeared to put the home side on course for victory when he headed home Marlon Hairston's 87th minute cross but Carroll salvaged a draw after he converted a pass from Fabian Herbers two minutes into stoppage time. The result kept the Rapids (28 points) top of the Western Conference as the Union (20 points) remained just ahead of the chasing pack in the East. More...