If you stick around Duel2, you will eventually hear about a concept called 'Knack.' It is also sometimes called a warrior's Luck Factor or Hidden Stats. Nobody completely understands what it is, but most managers agree that it exists.
First, understand that while Knack exists, there are many other items that contribute to a warrior's record. Sometimes you may think you have a knacky warrior, but you eventually figure out that it is something else that makes your warrior win. This can include favorites (every warrior has a set of favorites which they get bonuses when using), raw skills, as well as just plain old good design and management.
But sometimes, you'll run across a warrior that fights above and beyond (or below and before) their abilities. I will talk mostly about the positive side of knack, but the negative side also exists. Warriors with knack will just plain find ways to win. There is really nothing fancy about it. It doesn't mean they can't lose, but it does mean they win fights they shouldn't.
Pesticides is an example of a warrior that may be 'knacky.' He is a 15-12-16-11-9-14-7 Basher with great damage. His wit is pretty low and his will doesn't compensate. Nothing about him suggests that he should be winning most of his fights. His one loss is to a total parry (which isn't surprising for a basher, especially one with 4 starting attack). You can't be entirely sure when your warrior has 'it,' but time will tell the story. You also need to face competition that proves one way or another that you are better than you should be. But time tells the story as your warrior finds ways to win or lose fights, especially fights that look close.
Perhaps the best example of a Knacky warrior is a famous warrior named Daydream Believer. This PR started 17-14-4-17-7-8-17. Now understand that this is a solid design for a Parry Riposte. In addition, the warrior rolled +4 in both attack and parry. Finally, Mannequin, the manager, found DDB's favorites from fight #1. All of that together and you'd expect some major success from DDB. On the other side of things, 7 will... I (and many other managers) would fully expect to lose many a fight because of that 7 will. Well, DDB surpassed all expectations and TC'd Rookies, Adepts, Champions, and Challengers. DDB is the only naturally born warrior to TC 4 different classes. People have copied DDB's stats many times since then and to the best of my knowledge have never seen more than a single TC from those stats. Even with all the positives DDB had, you shouldn't see 4 TC's from this warrior. But DDB has that magical knack (in addition to everything else) and been cloned many times. While many of the clones have died one or more times, they have also generated something like 7 or 8 additional TC's.
This article is mostly to be aware that there is a 'knack' factor to warriors. Just because a warrior looks horrible on paper doesn't mean it can't win. And sometimes, you may have a warrior that looks fantastic on paper, but can't win. It is possible that warrior has 'inverse knack' and really is worse than it should be. Or it could just be that you've had bad luck or really bad matchups