A player is never as good as he seems when he's going well, and never as bad as he seems when things are down.
In his first 24 games (72 plate appearances) Martin's OPS was .995. His batting average on balls in play was .415.
Since then in 53 games (185 PA) his OPS has been .549 but his BABIP has been only .258.
.300 has been a good rule of thumb for BABIP for a long time, but more precisely it's been more like .290 across the majors lately (.289 this season so far).
I never call BABIP "luck." You put the ball in play and sometimes the fielders catch it and sometimes they don't but in every case the players are trying their best so it's nothing like rolling dice or dealing cards. Some batters maintain a high BABIP throughout their careers (Joe Mauer's was .341), likewise some pitchers can keep it low (Kershaw .275) so I consider it a certain sort of skill that is measurable. But it can represent an ebb and flow to the game until the sample size is large enough to stabilize.
So for the season as a whole Martin's OPS is .664 and it's built on a BABIP of .295. which doesn't look too far outside the norms. BABIP has been an up and down factor in our perceptions of him all along the way this season, but overall it's at a level you might expect to remain stable now, though his prior two partial seasons had a BABIP more like .320 so maybe he's still got some upward movement coming to him. But his season numbers are probably about who he is at the present time. He could improve in ways outside of BABIP (cutting down Ks, raising BBs or HRs), but is getting kind of old for that kind of expectation. He is who he is by now.