Title-holder McDowell's disappointing 

start in Mexico - 12 behind after a 75

Graeme McDowell's defence of the OHL Classic appeared to be in tatters after a disappointing opening round in Mexico.

McDowell, who won a three-man play-off last year, carded a four-over-par 75 which included one birdie and five bogeys, leaving him 12 shots off the pace.
Former world No 1 Luke Donald matched McDowell's poor round while fellow Englishman Ian Poulter was one over.

American Chris Kirk moved into the lead after recording eight birdies, including three in a row from the 13th, in his 63.
Kirk, a four-time US PGA Tour winner, was one shot clear of a chasing pack consisting of Americans Gary Woodland and Ben Crane plus Colombian Camilo Villegas.

Graeme McDowell is defending the OHL Classic

Webb Simpson, who has only won once in 102 starts since his 2012 US Open triumph, Aaron Wise, Scott Piercy, Kevin Streelman, Nicholas Lindheim and Abraham Ancer were one shot further back.
Scots Russell Knox and Martin Laird both had 68s in the first round.
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