I'd sit him if I had to for as many games against the Knicks as necessary until he's good and ready.
Shaq / JO
KG / Baby
Pierce / Green
Ray / Wafer
Rondo / Arroyo
If we can't beat the knicks with this lineup, we should just go home anyway.
Don't rush him back - we will need him more come Miami, Chicago and the Lakers or OKC.