Common sense, I didn't need to check for that because if that was the case he'd have complained about many players, but it's only about this one.
I posted a player that did just that on the post you quoted, C+ contact / B+ Power performing like some B/A for 2 seasons in a row. It supports my point about bad trends, though.
I do, I have worked on the mechanics of 3 baseball games that used different way to decide outcomes. One used cards from a shuffled deck, another used rotating numbers printed on the cards, and the other used dice. The results were finetuned for the way randomness works, allowing for very strange outcomes to be really rare, but eventually happen.
I can tell you that the way ABE behaves looks like the first case, if you bought many card decks, shuffled all of the cards, and recreated them, you'd end up with some bad decks where the bad cards accumulated and good decks where the good cards accumulated. If a player with great stats gets assigned a bad deck he's going to have a bad season. If he gets assigned a new deck at the start of the next season he's unlikely to get another bad deck again. This is how ABE behaves.
There's nothing wrong with that but admin told us he just programmed more than 1000 outcomes that could happen at each at bat, and their likelihood depends on the stats of the pitcher and the batter and of all the other players on the field, and on the bases, and each at bat is computed individually from everything else, like throwing dice.
I had to study the mechanics of games like Strat-O-Matic baseball, Out of the Park Baseball, Dynasty League Baseball, History Maker Baseball and others for my work, and on those a great player can have a bad game or two, or a bad player can have a great game or two, but none of them had an entire year of games like that, and if they do, it's because the game has implemented slump/hot mechanics and they were unlucky, you could see the reason.
ABE doesn't have an explanation for what happens, so it looks bugged, the OP and others are just going to quit when they find out it's all because of the bad randomness and they can't do anything about it, they can use the GM thing to build the team with the best offense and defense and not even make it to the playoffs. Who wins the world series is out of our control.