Casey determined to break into world top 50 at end of rollercoaster year
Casey won his fourth European Tour title in March and justified his wild card by finishing joint top points-scorer as Britain and Ireland retained the Seve Trophy.
However, the Ryder Cup star also went through a miserable slump in the middle of the year where he was 55 over par for nine rounds of golf, including a first-round 85 in the US Open.