Is it possible a waiver-wire pickup or well-scouted sleeper in your lineup this week will make the difference in you advancing to your league's championship or battling for third-place next week?
Sure.
Is it likely? Probably not.
It's much more likely your best players _ the players you likely drafted or traded for at some point _ will make the difference.
Don't overthink this. Fill your lineup with the players who have performed for you week-in, week-out.
Otherwise, you're just throwing darts and you're better than that.
You're a semifinalist. Good luck.
Here are my best bets for Week 15: