Normally, his brilliant ability to draw walks keep his OBP strong during slumps – or even during a tough season, like when he hit .241 last year but had a .384 OBP.
But so far in 2018, Carp has eight hits. One of them was a walk-off homer, yes. But eight hits in 50 at-bats (.160), so even his 14 walks make his OBP just .333.
Move him down. Or even move him to the lead-off spot (others fear this, but it's not like Dexter Fowler has been Rickey Henderson so far in '18).