McIlroy, Palmer, Henley and Knox in playoff at Honda

Mar 2, 2014; Palm Beach Gardens, FL, USA; Rory McIlroy on the 2nd tee during the final round of The Honda Classic golf tournament at PGA National GC Champion Course. Bob Donnan-USA TODAY Sports

(Reuters) - Overnight leader Rory McIlroy, Americans Ryan Palmer and Russell Henley and Scotland's Russell Knox took the Honda Classic into a sudden-death playoff at Palm Beach Gardens in Florida on Sunday. The quartet finished the regulation 72 holes level at eight-under-par 272, Northern Irishman McIlroy closing with a four-over 74 at PGA National, Palmer carding a 69, Henley a 72 and Knox a 71. (Reporting by Andrew Both in Cary, North Carolina; Editing by Mark Lamport-Stokes)