[Radsmats]

Under game settings / league settings / players there's something called Sabermetric player creation modifiers. In past versions of OOTP at least you could lower these (I would start with -.200 across the board) and you'll fill up the minors with plenty of injury subs who can't hit or pitch a lick.
Otherwise, every era has a position w/ a shortage of talent (usually 2b/3b/ss, sometimes catcher) where marginal players gain hugely in value simply because there's no replacements. IRL, even a league where half the SSs hit .215 had minor leagues below them where the SS would hit .200 if you called them up.
I haven't play-tested w/ 16 yet to see if it still works but it should.
One caution ... there's no setting for fielding / speed, so every year I would go into the minors, search for guys w/ 5-star ratings in those fields and nerf them too. If you wait til they get to the majors, the AI will overvalue them, which gives you a large advantage in draft / trade leagues.
I discovered this when after 5 or so years, every team had a track star or two on the bench who was also a defensive genius, which really devalues guys like Otis Nixon.