The Warriors ruled out one of their valued subs because of left foot soreness at the morning shootaround before Game 4. Golden State leads the Western Conference finals 3-0.
"He's still sore," Warriors coach Steve Kerr said. "We got to make the wise decision here. This gives him a couple of days to prepare for a possible Game 5, and we just don't want to take a chance of harming his future availability."
If Dallas can stay alive by winning Game 4 on Tuesday, there will be a Game 5 in San Francisco on Thursday. However, if the Warriors can sweep the Mavericks, they and Porter will have over a week off before the NBA Finals are scheduled to start on June 2.
Porter left Game 3 midway through the second quarter and was later ruled out because of the soreness. X-rays were negative. The team listed him as questionable on Monday night's injury report.
Porter is averaging 5.5 points and 4.1 rebounds this postseason.
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