Playing fantasy baseball without utilizing advanced metrics is equivalent to running with your legs tied together. You're not going to get far.
Implementing sabermetrics doesn't give gamers an edge on everyone else, but ignoring them puts players in a grave hole. Serious fantasy savants, especially DFS regulars, absorb every possible tidbit before reaching a decision.
The days of batting average, RBI and wins dominating the discussion are long gone. Along with constantly checking matchups, lineups and weather, players need to become heavily acquainted with FanGraphs and other data hot spots.
Of course, just knowing a number doesn't help without understanding its meaning.