NEW YORK—The NBC telecast of a Knicks-Pacers game yielded a surprise celebrity sighting Saturday, when Friends star Matt LeBlanc was spotted in a front-row seat by a TV cameraman. "Say, there's Matt LeBlanc, star of the hit comedy Friends, airing Thursdays at 8 p.m. EST right here on NBC," color commentator Bill Walton said of the unexpected star sighting. "Matt seems to be enjoying this exciting contest as much as we all enjoy watching Friends each week." Walton went on to note that this Thursday, Ross mistakenly thinks Chandler got a vasectomy.