Spurs coach Gregg Popovich previously replaced Splitter with forward Matt Bonner for Games 5 and 6 of the Western Conference finals against the Thunder. He has used his traditional starting lineup -- Parker, Green, Leonard, Duncan and Splitter -- the rest of the postseason.
Replacing Splitter with Diaw gives the Spurs a better matchup against the Heat's small-ball, spread-oriented lineup. Splitter, a traditional center, struggled in Game 2, while Lewis, a stretch forward, has proved to be a key X-factor in the series.
The Point Forward broke down San Antonio's lineup quandary in detail earlier Tuesday.
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