In my opinion you'll need to hit at least .280 with an OBP of .350-360 if you want to have job stability.

Just tonight, you had one great at bat where you fouled off a ton of pitches and worked Arroyo for a walk and we ended up scoring a couple of runs because of that walk.

Then you strike out the next two times up!
anything lower than a .280 average and a 1-2 walks to strikeout ratio and I think your hold on first base is not for long.

By the way, congrats on your baby!