His best finish in a major is a tie for 9th at the 2008 U.S. Open and he has featured in the top 100 of the Official World Golf Ranking.

[6] Slocum barely qualified for the 2009 FedEx Cup Playoffs; he finished 124th on the regular season points list, just ahead of Troy Matteson, the 125th and final entrant.

At the first playoff event, The Barclays at Liberty National Golf Club in New Jersey, he won the event by one stroke, holing a 21-foot putt for par on the last hole to deny Ernie Els, Pádraig Harrington, Steve Stricker, and Tiger Woods the chance of victory.

During the main portion of the season, he recorded four top-ten finishes, including a tie for 4th at The Players Championship.

Slocum held off Bill Haas by one stroke to earn the fourth title of his PGA Tour career.

That season, he had a best result of fourth at the Wyndham Championship but only collected three top-25s, forcing him to return to the Web.com Tour Finals.

Between 2016 and 2022, Slocum participated in a total of 22 PGA Tour events, making the cut just three times.

In 2022 and 2023, Slocum was also active on the Korn Ferry Tour, playing 15 total events, but missed the cut in every tournament.