I was curious so just went and looked, I'm not so sure Jeanty should be dismissed, particularly if he can put together a good final two weeks. You note here his 55 yards per game, but he also has 50 rec for 326 yards and 5 TDs in the passing game, that can't just be dismissed and only look at his rushing stats.
Jeanty has 1,154 scrimmage yards and 10 TDs this year with 2 games to go and very well could hit 1k rushing as well.
I'm not saying he should win it over T-Mac, but the more I look at his numbers, I'm surprised he isn't considered to be more in the running at the moment (granted, 188 yards and 2 TDs were just this week to help boost those numbers, but they're still impressive for any rookie, even if people expected more out of him before the season)