front runner
Any of the most likely winners in a contest, election, etc.
[T]he American League pennant did not shape up as much of a race. There were the Indians and the Yankees, front runners as usual.
ADJ
fast, good | distance, long-distance, marathon, middle-distance | cross-country, fell, road
front
She was the front runner in the competition until the final race last week.
fancied
The fancied runner pulled a muscle during warm-up and had to withdraw from the competition.