Jermaine and Shaquille O'Neal were healthy enough to play a combined 23 minutes in the Celtics' 101-90 win over Detroit last night, but only four minutes came in the second half, a sign of their fragility. Shaquille logged 5:29 before leaving with a strained right calf. Jermaine was willing to go beyond the 17:40 he played, but the Celtics do not want to push him — yet. "We have to have one of the [O'Neals],'' coach Doc Rivers said. "I'll take two, but we have to have one.''