Jimmy Walker with a Shot of the Year contender in Texas

Jimmy Walker played one of the most remarkable shots of his career on the opening day of the AT&T Byron Nelson as he came close to an improbable eagle at the final hole.

Walker continued his good form from TPC Sawgrass last week as he raced to the turn in 31 and picked up further shots at 14 and 16 to get to seven under for the day, but he looked likely to card his only bogey at the 18th after a poor drive.

The Texan's tee shot faded too far right and found an awkward lie hanging on the lip of a fairway bunker, forcing Walker and his caddie to discuss pitching back out to the fairway rather than attempt what appeared to be an impossible shot to get to the green.

But the degree of difficulty, and the uncertainty of how - and where - his ball would come out were put to the back of Walker's mind as he decided to hit and hope with his 172-yard second.

The 2016 PGA champion knew he had made decent contact, but he did not seem to realise which direction his ball was headed as he glanced over at his caddie. But the cameras picked up his ball landing to the left of the green before catching the slope and heading towards the hole.

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As it turned out, Walker came within a few inches of making one of the most incredible eagles ever witnessed on the PGA Tour, but he had to settle for a par and a round of 64 as his birdie putt was a shade off line.

Watch the video above to see Jimmy Walker's moment of magic at the AT&T Byron Nelson ...